MESON Chess Problem Database
Problem Display
PID: 287570 (1q6/2RpN3/8/Q1b5/2rkBBb1/1pN1R2r/5P2/1K2n1n1 w - - 0 1)
van der Burgt, M
Probleemblad, 1959
#2
9 + 10
SOLUTION
- SOUND
- Sets
- 1...Qa7
- 2.Sb5#
- 1...Qxc7
- 2.Sb5#
- 1...Qb5
- 2.Sxb5#
- 1...Qa8
- 2.Sb5#
- 1...Qc8
- 2.Sb5#
- 1...Qd8
- 2.Sb5#
- 1...Qe8
- 2.Sb5#
- 1...Qf8
- 2.Sb5#
- 1...Qg8
- 2.Sb5#
- 1...Qh8
- 2.Sb5#
- 1...Rxe3
- 2.fxe3#
- 1...Rxc3
- 2.Qxc3#
- 1...Ra4
- 2.Qxc5#
- 1...Rb4
- 2.Qxc5#
- 1...Bd1
- 2.Sf5#
- 1...Be2
- 2.Sf5#
- 1...Bf3
- 2.Sf5#
- 1...Bf5
- 2.Sxf5#
- 1...Bh5
- 2.Sf5#
- 1...Ba3
- 2.Be5#
- 2.Qd5#
- 2.Qe5#
- 1...Bb4
- 2.Be5#
- 2.Qd5#
- 2.Qe5#
- 1...Bb6
- 2.Sb5#
- 2.Be5#
- 2.Qd5#
- 2.Qe5#
- 1...Bd6
- 2.Qd5#
- 1...Ba7
- 2.Be5#
- 2.Qd5#
- 2.Qe5#
- 1...Bxe7
- 2.Be5#
- 2.Qd5#
- 2.Qe5#
- 1...Sef3
- 2.Rd3#
- 1...Sgf3
- 2.Se2#
- 1...d5
- 2.Sc6#
- 1...d6
- 2.Sc6#
- 1...Qa7
- Tries
- 1.Se2+?
- 1...Bxe2
- 2.Sf5#
- 1...Sxe2!
- 1...Bxe2
- 1.Bc2?
- threat
- 2.Be5#
- 2.Re4#
- 1...Qxc7
- 2.Sb5#
- 2.Re4#
- 1...Rxe3
- 2.fxe3#
- 1...Rxc3
- 2.Re4#
- 2.Qxc3#
- 1...Sxc2
- 2.Be5#
- 1...Ra4
- 2.Re4#
- 2.Qxc5#
- 1...Rb4
- 2.Qxc5#
- 1...Qb4
- 2.Be5#
- 1...Qb7
- 2.Be5#
- 1...Qa8
- 2.Sb5#
- 2.Be5#
- 1...Qh8
- 2.Sb5#
- 2.Re4#
- 1...Rh5
- 2.Re4#
- 1...Bf3
- 2.Sf5#
- 2.Be5#
- 1...Bf5
- 2.Sxf5#
- 2.Be5#
- 1...Bb4
- 2.Be5#
- 2.Qd5#
- 2.Qe5#
- 1...Bd6
- 2.Re4#
- 2.Qd5#
- 1...Sd3
- 2.Re4#
- 1...Sef3
- 2.Rd3#
- 2.Re4#
- 1...Sgf3
- 2.Se2#
- 2.Re4#
- 1...d5
- 2.Sc6#
- 2.Be5#
- 1...d6
- 2.Sc6#
- 2.Re4#
- 1...bxc2+!
- threat
- 1.Bg6?
- threat
- 2.Be5#
- 1...Bf5+
- 2.Sxf5#
- 1...Qxc7
- 2.Sb5#
- 1...Rxe3
- 2.fxe3#
- 1...Rxc3
- 2.Qxc3#
- 1...Ra4
- 2.Qxc5#
- 1...Rb4
- 2.Qxc5#
- 1...Qh8
- 2.Sb5#
- 1...Bd6
- 2.Qd5#
- 1...Sd3
- 2.Re4#
- 1...Sef3
- 2.Rd3#
- 1...Sgf3
- 2.Se2#
- 1...d6
- 2.Sc6#
- 1...Rh5!
- threat
- 1.Bb7?
- threat
- 2.Sb5#
- 2.Be5#
- 1...Bf5+
- 2.Sxf5#
- 1...Qxc7
- 2.Sb5#
- 1...Qxb7
- 2.Be5#
- 1...Rxc3
- 2.Qxc3#
- 1...Ra4
- 2.Qxc5#
- 1...Rb4
- 2.Qxc5#
- 1...Rh5
- 2.Sb5#
- 1...Qh8
- 2.Sb5#
- 1...Bd6
- 2.Sb5#
- 2.Qd5#
- 1...Sd3
- 2.Sb5#
- 2.Re4#
- 1...Sef3
- 2.Sb5#
- 1...Sgf3
- 2.Se2#
- 2.Sb5#
- 1...d6
- 2.Sb5#
- 2.Sc6#
- 1...Rxe3!
- threat
- 1.Bh7?
- threat
- 2.Be5#
- 1...Bf5+
- 2.Sxf5#
- 1...Qxc7
- 2.Sb5#
- 1...Rxe3
- 2.fxe3#
- 1...Rxc3
- 2.Qxc3#
- 1...Ra4
- 2.Qxc5#
- 1...Rb4
- 2.Qxc5#
- 1...Qh8
- 2.Sb5#
- 1...Bd6
- 2.Qd5#
- 1...Sd3
- 2.Re4#
- 1...Sef3
- 2.Rd3#
- 1...Sgf3
- 2.Se2#
- 1...d6
- 2.Sc6#
- 1...Rh5!
- threat
- 1.Rxd7+?
- 1...Qd6
- 2.Sb5#
- 2.Sc6#
- 1...Bd6
- 2.Be5#
- 2.Qd5#
- 2.Qe5#
- 1...Bxd7!
- 1...Qd6
- 1.Se2+?
- Keys
- 1.Bf5!
- threat
- 2.Be5#
- 1...Bxf5+
- 2.Sxf5#
- 1...Qxc7
- 2.Sb5#
- 1...Rxe3
- 2.fxe3#
- 1...Rxc3
- 2.Qxc3#
- 1...Ra4
- 2.Qxc5#
- 1...Rb4
- 2.Qxc5#
- 1...Qh8
- 2.Sb5#
- 1...Bd6
- 2.Qd5#
- 1...Sd3
- 2.Re4#
- 1...Sef3
- 2.Rd3#
- 1...Sgf3
- 2.Se2#
- 1...d6
- 2.Sc6#
- threat
- 1.Bf5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 13
- Sets
- Q(j);N_GUARD::S(C)
- Q(j);N_GUARD,XR(H)::S(C)
- Q(j);N_GUARD::S(C),XQ(j)
- R(d);OGATE,XR(D)::P(B),XR(d)
- R(e);OGATE,XS(C)::QAB1(G),XR(e)
- R(e);N_GUARD::QAB1(G),XB(h)
- B(g);N_GUARD::S(I)
- B(g);N_GUARD,P_PINB(E)::S(I),XB(g)
- B(h);OGATE::QAR1(G)
- S(a);N_GUARD,S_CUTR(d)::R1(D)
- S(b);N_GUARD,S_CUTB(g)::S(C)
- P(i);N_GUARD::S(I)
- Tries
- Try
- S(C);CHECK
- Vars
- B(g);XS(C)::S(I)
- Refutation
- S(b);XS(C)
- Try
- B(E);
- Threat
- DUALS(2)
- Vars
- R(d);OGATE,XR(D)::P(B),XR(d)
- S(a);XB(E)::B(F)
- R(e);N_GUARD::QAB1(G),XB(h)
- Q(j);::B(F)
- R(d);::R1(D)
- S(a);::R1(D)
- Refutation
- P(c);CHECK,XB(E)
- Try
- B(E);
- Threat
- B(F)
- Vars
- B(g);CHECK,N_GUARD::S(I),XB(g)
- Q(j);N_GUARD,XR(H)::S(C)
- R(d);OGATE,XR(D)::P(B),XR(d)
- R(e);OGATE,XS(C)::QAB1(G),XR(e)
- R(e);N_GUARD::QAB1(G),XB(h)
- Q(j);N_GUARD::S(C)
- B(h);OGATE::QAR1(G)
- S(a);SBLOCK::R1(D)
- S(a);N_GUARD,S_CUTR(d)::R1(D)
- S(b);N_GUARD,S_CUTB(g)::S(C)
- P(i);N_GUARD::S(I)
- Refutation
- R(d);
- Try
- B(E);
- Threat
- DUALS(2)
- Vars
- B(g);CHECK,N_GUARD::S(I),XB(g)
- Q(j);XR(H)::S(C)
- Q(j);XB(E)::B(F)
- R(e);OGATE,XS(C)::QAB1(G),XR(e)
- R(e);N_GUARD::QAB1(G),XB(h)
- R(d);::S(C)
- Q(j);::S(C)
- S(a);::S(C)
- Refutation
- R(d);XR(D)
- Try
- B(E);
- Threat
- B(F)
- Vars
- B(g);CHECK,N_GUARD::S(I),XB(g)
- Q(j);N_GUARD,XR(H)::S(C)
- R(d);OGATE,XR(D)::P(B),XR(d)
- R(e);OGATE,XS(C)::QAB1(G),XR(e)
- R(e);N_GUARD::QAB1(G),XB(h)
- Q(j);N_GUARD::S(C)
- B(h);OGATE::QAR1(G)
- S(a);SBLOCK::R1(D)
- S(a);N_GUARD,S_CUTR(d)::R1(D)
- S(b);N_GUARD,S_CUTB(g)::S(C)
- P(i);N_GUARD::S(I)
- Refutation
- R(d);
- Try
- R(H);CHECK,XP(i)
- Refutation
- B(g);XR(H)
- Try
- Actual
- B(E);
- Threat
- B(F)
- Vars
- B(g);CHECK,XB(E)::S(I),XB(g)
- Q(j);N_GUARD,XR(H)::S(C)
- R(d);OGATE,XR(D)::P(B),XR(d)
- R(e);OGATE,XS(C)::QAB1(G),XR(e)
- R(e);N_GUARD::QAB1(G),XB(h)
- Q(j);N_GUARD::S(C)
- B(h);OGATE::QAR1(G)
- S(a);SBLOCK::R1(D)
- S(a);N_GUARD,S_CUTR(d)::R1(D)
- S(b);N_GUARD,S_CUTB(g)::S(C)
- P(i);N_GUARD::S(I)
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).