MESON Chess Problem Database
Problem Display
PID: 213814 (6KB/2Np1N2/1p1Q2P1/1pq5/1Rb1k3/8/3PBRn1/4n3 w - - 0 1)
Okonkowski, Paul Anton
Suomen Shakki, 1944
#2
10 + 8
| 15148 | Sadier Collection | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qxf2
- 2.Qe5#
- 1...Qe3
- 2.Qe5#
- 2.Qe7#
- 2.Qd5#
- 1...Qxb4
- 2.Qe5#
- 2.Qd4#
- 1...Qd4
- 2.Qxd4#
- 1...Qd5
- 2.Qxd5#
- 1...Qe5
- 2.Qxe5#
- 1...Qf5
- 2.Qd4#
- 1...Qg5
- 2.Qd4#
- 1...Qh5
- 2.Qd4#
- 1...Qc6
- 2.Qe5#
- 2.Qd4#
- 1...Qxc7
- 2.Qd4#
- 1...Sc2
- 2.Bd3#
- 2.Qd3#
- 1...Sd3
- 2.Bxd3#
- 2.Qxd3#
- 1...Sf3
- 2.Bd3#
- 1...Se3
- 2.Rf4#
- 2.Qf4#
- 1...Sf4
- 2.Rxf4#
- 2.Qxf4#
- 1...Sh4
- 2.Rf4#
- 2.Qf4#
- 1...Qxf2
- Tries
- 1.Kh7?
- 1...Qxf2
- 2.Qe5#
- 1...Qxb4
- 2.Sg5#
- 2.Qe5#
- 2.Qd4#
- 1...Qxd6
- 2.Sg5#
- 2.Sxd6#
- 1...Qxc7
- 2.Sg5#
- 2.Qd4#
- 1...Sf3
- 2.Bd3#
- 1...Sf4
- 2.Rxf4#
- 2.Qxf4#
- 1...Qe3
- 2.Qe5#
- 2.Qe7#
- 2.Qd5#
- 1...Qd4
- 2.Sg5#
- 2.Qxd4#
- 1...Qd5
- 2.Qxd5#
- 1...Qe5
- 2.Qxe5#
- 1...Qf5
- 2.Qd4#
- 1...Qg5
- 2.Sxg5#
- 2.Qd4#
- 1...Qc6
- 2.Sg5#
- 2.Qe5#
- 2.Qd4#
- 1...Sc2
- 2.Bd3#
- 2.Qd3#
- 1...Sd3
- 2.Bxd3#
- 2.Qxd3#
- 1...Se3
- 2.Rf4#
- 2.Qf4#
- 1...Sh4
- 2.Rf4#
- 2.Qf4#
- 1...Qh5+!
- 1...Qxf2
- 1.Sxb5?
- threat
- 2.Sc3#
- 1...Qxf2
- 2.Qe5#
- 1...Qxb4
- 2.Qe5#
- 2.Qd4#
- 1...Qxb5
- 2.Qd4#
- 1...Sf3
- 2.Bd3#
- 1...Sf4
- 2.Rxf4#
- 1...Qe3
- 2.Qe5#
- 1...Qd4
- 2.Qxd4#
- 1...Qe5
- 2.Qxe5#
- 1...Qc8+!
- threat
- 1.Bf3+?
- 1...Kf5
- 2.Qf6#
- 1...Sxf3!
- 1...Kf5
- 1.Ba1?
- 1...Qxf2
- 2.Qe5#
- 1...Qxb4
- 2.Qe5#
- 2.Qd4#
- 1...Qxc7
- 2.Qd4#
- 1...Sf3
- 2.Bd3#
- 1...Sf4
- 2.Rxf4#
- 2.Qxf4#
- 1...Qe3
- 2.Qe5#
- 2.Qe7#
- 2.Qd5#
- 1...Qd4
- 2.Qxd4#
- 1...Qd5
- 2.Qxd5#
- 1...Qe5
- 2.Qxe5#
- 1...Qf5
- 2.Qd4#
- 1...Qg5
- 2.Qd4#
- 1...Qh5
- 2.Qd4#
- 1...Qc6
- 2.Qe5#
- 2.Qd4#
- 1...Sc2
- 2.Bd3#
- 2.Qd3#
- 1...Sd3
- 2.Bxd3#
- 2.Qxd3#
- 1...Se3
- 2.Rf4#
- 2.Qf4#
- 1...Sh4
- 2.Rf4#
- 2.Qf4#
- 1...Qxd6!
- 1...Qxf2
- 1.Bb2?
- 1...Qxf2
- 2.Qe5#
- 1...Qxb4
- 2.Qe5#
- 2.Qd4#
- 1...Qxc7
- 2.Qd4#
- 1...Sf3
- 2.Bd3#
- 1...Sf4
- 2.Rxf4#
- 2.Qxf4#
- 1...Qe3
- 2.Qe5#
- 2.Qe7#
- 2.Qd5#
- 1...Qd4
- 2.Qxd4#
- 1...Qd5
- 2.Qxd5#
- 1...Qe5
- 2.Qxe5#
- 1...Qf5
- 2.Qd4#
- 1...Qg5
- 2.Qd4#
- 1...Qh5
- 2.Qd4#
- 1...Qc6
- 2.Qe5#
- 2.Qd4#
- 1...Sc2
- 2.Bd3#
- 2.Qd3#
- 1...Sd3
- 2.Bxd3#
- 2.Qxd3#
- 1...Se3
- 2.Rf4#
- 2.Qf4#
- 1...Sh4
- 2.Rf4#
- 2.Qf4#
- 1...Qxd6!
- 1...Qxf2
- 1.Bc3?
- 1...Qxf2
- 2.Qe5#
- 1...Qxb4
- 2.Qe5#
- 2.Qd4#
- 1...Qxc7
- 2.Qd4#
- 1...Sf3
- 2.Bd3#
- 1...Sf4
- 2.Rxf4#
- 2.Qxf4#
- 1...Qe3
- 2.Qe5#
- 2.Qe7#
- 2.Qd5#
- 1...Qd4
- 2.Qxd4#
- 1...Qd5
- 2.Qxd5#
- 1...Qe5
- 2.Qxe5#
- 1...Qf5
- 2.Qd4#
- 1...Qg5
- 2.Qd4#
- 1...Qh5
- 2.Qd4#
- 1...Qc6
- 2.Qe5#
- 2.Qd4#
- 1...Sc2
- 2.Bd3#
- 2.Qd3#
- 1...Sd3
- 2.Bxd3#
- 2.Qxd3#
- 1...Se3
- 2.Rf4#
- 2.Qf4#
- 1...Sh4
- 2.Rf4#
- 2.Qf4#
- 1...Qxd6!
- 1...Qxf2
- 1.Bf6?
- 1...Qxf2
- 2.Qe5#
- 1...Qxb4
- 2.Qe5#
- 2.Qd4#
- 1...Qxc7
- 2.Qd4#
- 1...Sf3
- 2.Bd3#
- 1...Sf4
- 2.Rxf4#
- 2.Qxf4#
- 1...Qe3
- 2.Qe5#
- 2.Qe7#
- 2.Qd5#
- 1...Qd4
- 2.Qxd4#
- 1...Qd5
- 2.Qxd5#
- 1...Qe5
- 2.Qxe5#
- 1...Qf5
- 2.Qd4#
- 1...Qg5
- 2.Qd4#
- 1...Qh5
- 2.Qd4#
- 1...Qc6
- 2.Qe5#
- 2.Qd4#
- 1...Sc2
- 2.Bd3#
- 2.Qd3#
- 1...Sd3
- 2.Bxd3#
- 2.Qxd3#
- 1...Se3
- 2.Rf4#
- 2.Qf4#
- 1...Sh4
- 2.Rf4#
- 2.Qf4#
- 1...Qxd6!
- 1...Qxf2
- 1.Bg7?
- 1...Qxf2
- 2.Qe5#
- 1...Qxb4
- 2.Qe5#
- 2.Qd4#
- 1...Qxc7
- 2.Qd4#
- 1...Sf3
- 2.Bd3#
- 1...Sf4
- 2.Rxf4#
- 2.Qxf4#
- 1...Qe3
- 2.Qe5#
- 2.Qe7#
- 2.Qd5#
- 1...Qd4
- 2.Qxd4#
- 1...Qd5
- 2.Qxd5#
- 1...Qe5
- 2.Qxe5#
- 1...Qf5
- 2.Qd4#
- 1...Qg5
- 2.Qd4#
- 1...Qh5
- 2.Qd4#
- 1...Qc6
- 2.Qe5#
- 2.Qd4#
- 1...Sc2
- 2.Bd3#
- 2.Qd3#
- 1...Sd3
- 2.Bxd3#
- 2.Qxd3#
- 1...Se3
- 2.Rf4#
- 2.Qf4#
- 1...Sh4
- 2.Rf4#
- 2.Qf4#
- 1...Qxd6!
- 1...Qxf2
- 1.Rf1?
- 1...Qxb4
- 2.Qe5#
- 2.Qd4#
- 1...Qxc7
- 2.Qd4#
- 1...Qf2
- 2.Qe5#
- 1...Sf3
- 2.Bd3#
- 1...Sf4
- 2.Rxf4#
- 2.Qxf4#
- 1...Qg1
- 2.Qe5#
- 2.Qe7#
- 2.Qd5#
- 1...Qe3
- 2.Qe5#
- 2.Qe7#
- 2.Qd5#
- 1...Qd4
- 2.Qxd4#
- 1...Qd5
- 2.Qxd5#
- 1...Qe5
- 2.Qxe5#
- 1...Qf5
- 2.Qd4#
- 1...Qg5
- 2.Qd4#
- 1...Qh5
- 2.Qd4#
- 1...Qc6
- 2.Qe5#
- 2.Qd4#
- 1...Sc2
- 2.Bd3#
- 2.Qd3#
- 1...Sd3
- 2.Bxd3#
- 2.Qxd3#
- 1...Se3
- 2.Rf4#
- 2.Qf4#
- 1...Sh4
- 2.Rf4#
- 2.Qf4#
- 1...Qxd6!
- 1...Qxb4
- 1.Rf3?
- 1...Qxb4
- 2.Qe5#
- 2.Qd4#
- 1...Qxc7
- 2.Qd4#
- 1...Sxf3
- 2.Bd3#
- 1...Sf4
- 2.Rxf4#
- 2.Qxf4#
- 1...Qg1
- 2.Qe5#
- 2.Qe7#
- 2.Qd5#
- 1...Qf2
- 2.Qe5#
- 2.Qe7#
- 2.Qd5#
- 1...Qe3
- 2.Qe5#
- 2.Qe7#
- 2.Qd5#
- 1...Qd4
- 2.Qxd4#
- 1...Qd5
- 2.Qxd5#
- 1...Qe5
- 2.Qxe5#
- 1...Qf5
- 2.Qd4#
- 1...Qg5
- 2.Qd4#
- 1...Qh5
- 2.Qd4#
- 1...Qc6
- 2.Qe5#
- 2.Qd4#
- 1...Sc2
- 2.Qd3#
- 2.d3#
- 1...Sd3
- 2.Qxd3#
- 1...Se3
- 2.Rf4#
- 2.Qf4#
- 1...Sh4
- 2.Rf4#
- 2.Qf4#
- 1...Qxd6!
- 1...Qxb4
- 1.Rxc4+?
- 1...Qd4
- 2.Sg5#
- 2.Rxd4#
- 2.Qe5#
- 2.Qe7#
- 2.Qxd4#
- 2.Qd5#
- 1...Qxc4
- 2.Qe5#
- 1...bxc4!
- 1...Qd4
- 1.Qe7+?
- 1...Qe5
- 2.Qxe5#
- 1...Qxe7!
- 1...Qe5
- 1.Qe6+?
- 1...Qe5
- 2.Qxe5#
- 1...dxe6!
- 1...Qe5
- 1.d3+?
- 1...Sxd3
- 2.Qxd3#
- 1...Ke3!
- 1...Sxd3
- 1.Kh7?
- Keys
- 1.Kf8!
- 1...Qxd6+
- 2.Sxd6#
- 1...Qxf2
- 2.Qe5#
- 1...Qxb4
- 2.Sg5#
- 1...Qxc7
- 2.Sg5#
- 2.Qd4#
- 1...Sf3
- 2.Bd3#
- 1...Sf4
- 2.Rxf4#
- 1...Qe3
- 2.Qe5#
- 2.Qe7#
- 2.Qd5#
- 1...Qd4
- 2.Sg5#
- 2.Qxd4#
- 1...Qd5
- 2.Qxd5#
- 1...Qe5
- 2.Qxe5#
- 1...Qf5
- 2.Qd4#
- 1...Qg5
- 2.Sxg5#
- 2.Qd4#
- 1...Qh5
- 2.Qd4#
- 1...Qc6
- 2.Sg5#
- 2.Qe5#
- 2.Qd4#
- 1...Sc2
- 2.Bd3#
- 1...Sd3
- 2.Bxd3#
- 1...Se3
- 2.Rf4#
- 1...Sh4
- 2.Rf4#
- 1...Qxd6+
- 1.Kf8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 3
- Sets
- Q(f);N_GUARD,XR(C)::QAR1(E)
- Q(f);N_GUARD,N_SPINB(c)::QAR1(E),XQ(f)
- Q(f);N_GUARD::QAB1(E),XQ(f)
- Q(f);N_GUARD::QAR1(E),XQ(f)
- Q(f);N_GUARD::QAR1(E)
- Q(f);N_GUARD,P_PINP(F)::QAR1(E)
- Q(f);N_GUARD,XS(G)::QAR1(E)
- S(a);N_GUARD::B(B)
- Tries
- Try
- K(I);N_SPINS(H),S_FLIGHT
- Vars
- Q(f);N_GUARD,XR(C)::QAR1(E)
- S(a);N_GUARD::B(B)
- Q(f);N_GUARD::QAB1(E),XQ(f)
- Q(f);N_GUARD::QAR1(E),XQ(f)
- Q(f);N_GUARD,P_PINP(F)::QAR1(E)
- Refutation
- Q(f);CHECK
- Try
- S(G);XP(e)
- Threat
- S(G)
- Vars
- Q(f);N_GUARD,XR(C)::QAR1(E)
- Q(f);N_GUARD,XS(G)::QAR1(E)
- S(a);N_GUARD::B(B)
- S(b);N_GUARD::R1(C),XS(b)
- Q(f);N_GUARD::QAR1(E)
- Q(f);N_GUARD,N_SPINB(c)::QAR1(E),XQ(f)
- Q(f);N_GUARD::QAR1(E),XQ(f)
- Refutation
- Q(f);CHECK
- Try
- B(B);CHECK
- Vars
- K(d);N_SPINB(c),S_FLIGHT::QAR1(E)
- Refutation
- S(a);XB(B)
- Try
- B(J);
- Vars
- Q(f);N_GUARD,XR(C)::QAR1(E)
- Q(f);N_GUARD,XS(G)::QAR1(E)
- S(a);N_GUARD::B(B)
- Q(f);N_GUARD,N_SPINB(c)::QAR1(E),XQ(f)
- Q(f);N_GUARD::QAB1(E),XQ(f)
- Q(f);N_GUARD::QAR1(E),XQ(f)
- Q(f);N_GUARD::QAR1(E)
- Q(f);N_GUARD,P_PINP(F)::QAR1(E)
- Refutation
- Q(f);XQ(E)
- Try
- B(J);
- Vars
- Q(f);N_GUARD,XR(C)::QAR1(E)
- Q(f);N_GUARD,XS(G)::QAR1(E)
- S(a);N_GUARD::B(B)
- Q(f);N_GUARD,N_SPINB(c)::QAR1(E),XQ(f)
- Q(f);N_GUARD::QAB1(E),XQ(f)
- Q(f);N_GUARD::QAR1(E),XQ(f)
- Q(f);N_GUARD::QAR1(E)
- Q(f);N_GUARD,P_PINP(F)::QAR1(E)
- Refutation
- Q(f);XQ(E)
- Try
- B(J);
- Vars
- Q(f);N_GUARD,XR(C)::QAR1(E)
- Q(f);N_GUARD,XS(G)::QAR1(E)
- S(a);N_GUARD::B(B)
- Q(f);N_GUARD,N_SPINB(c)::QAR1(E),XQ(f)
- Q(f);N_GUARD::QAB1(E),XQ(f)
- Q(f);N_GUARD::QAR1(E),XQ(f)
- Q(f);N_GUARD::QAR1(E)
- Q(f);N_GUARD,P_PINP(F)::QAR1(E)
- Refutation
- Q(f);XQ(E)
- Try
- B(J);
- Vars
- Q(f);N_GUARD,XR(C)::QAR1(E)
- Q(f);N_GUARD,XS(G)::QAR1(E)
- S(a);N_GUARD::B(B)
- Q(f);N_GUARD,N_SPINB(c)::QAR1(E),XQ(f)
- Q(f);N_GUARD::QAB1(E),XQ(f)
- Q(f);N_GUARD::QAR1(E),XQ(f)
- Q(f);N_GUARD::QAR1(E)
- Q(f);N_GUARD,P_PINP(F)::QAR1(E)
- Refutation
- Q(f);XQ(E)
- Try
- B(J);
- Vars
- Q(f);N_GUARD,XR(C)::QAR1(E)
- Q(f);N_GUARD,XS(G)::QAR1(E)
- S(a);N_GUARD::B(B)
- Q(f);N_GUARD,N_SPINB(c)::QAR1(E),XQ(f)
- Q(f);N_GUARD::QAB1(E),XQ(f)
- Q(f);N_GUARD::QAR1(E),XQ(f)
- Q(f);N_GUARD::QAR1(E)
- Refutation
- Q(f);XQ(E)
- Try
- R(C);
- Vars
- Q(f);N_GUARD,XS(G)::QAR1(E)
- Q(f);N_GUARD::QAR1(E)
- S(a);N_GUARD::B(B)
- Q(f);N_GUARD,N_SPINB(c)::QAR1(E),XQ(f)
- Q(f);N_GUARD::QAB1(E),XQ(f)
- Q(f);N_GUARD::QAR1(E),XQ(f)
- Q(f);N_GUARD,P_PINP(F)::QAR1(E)
- Refutation
- Q(f);XQ(E)
- Try
- R(C);
- Vars
- Q(f);N_GUARD,XS(G)::QAR1(E)
- S(a);N_GUARD,SBLOCK,XR(C)::B(B)
- Q(f);N_GUARD,N_SPINB(c)::QAR1(E),XQ(f)
- Q(f);N_GUARD::QAB1(E),XQ(f)
- Q(f);N_GUARD::QAR1(E),XQ(f)
- Q(f);N_GUARD::QAR1(E)
- Q(f);N_GUARD,P_PINP(F)::QAR1(E)
- S(a);N_GUARD::QAB1(E),XS(a)
- Refutation
- Q(f);XQ(E)
- Try
- R(D);CHECK,N_SPINS(H),XB(c)
- Vars
- Q(f);P_PINS(H),XR(D)::QAR1(E)
- Refutation
- P(e);XR(D)
- Try
- Q(E);CHECK
- Vars
- Q(f);N_GUARD,P_SPINQ(f)::QAR1(E),XQ(f)
- Refutation
- Q(f);XQ(E)
- Try
- Q(E);CHECK,N_SPINS(H)
- Vars
- Q(f);N_GUARD,P_SPINQ(f)::QAR1(E),XQ(f)
- Refutation
- P(h);XQ(E)
- Try
- P(A);CHECK
- Vars
- S(a);OGATE,XP(A)::QAB1(E),XS(a)
- Refutation
- K(d);N_SPINB(c),P-FLIGHT
- Try
- Actual
- K(I);N_SPINS(H),P-FLIGHT,P_SPINQ(E)
- Vars
- Q(f);CHECK,XQ(E)::S(H),XQ(f)
- Q(f);N_PINQ(E),P_PINS(H),XR(C)::QAR1(E)
- Q(f);N_GUARD,N_SPINB(c),XR(D)::S(H)
- S(a);N_GUARD::B(B)
- S(b);N_GUARD::R1(C),XS(b)
- Q(f);N_PINQ(E)::QAB1(E),XQ(f)
- Q(f);N_PINQ(E)::QAR1(E),XQ(f)
- Q(f);N_PINQ(E),P_PINS(H)::QAR1(E)
- Q(f);N_PINQ(E)::QAR1(E)
- S(a);N_GUARD::B(B),XS(a)
- S(b);N_GUARD::R1(C)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).