MESON Chess Problem Database
Problem Display
PID: 65389 (Q3bR2/4Pn2/2r3Rn/2P2k1P/2PB4/1p4P1/3N2K1/3B4 w - - 0 1)
Heinonen, Unto
2nd Prize, Ceramica di Imola TT, 1974-1975
#2
12 + 6
SOLUTION
- SOUND
- Sets
- 1...Rxc5
- 2.Qf3#
- 2.Qe4#
- 1...Ra6
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rb6
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rd6
- 2.Qf3#
- 2.Qe4#
- 1...Re6
- 2.Qf3#
- 1...Rf6
- 2.Qe4#
- 1...Rxg6
- 2.Qd5#
- 1...Rc7
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rc8
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Sg4
- 2.Bxg4#
- 1...Sg8
- 2.Bg4#
- 1...b2
- 2.Bc2#
- 1...Rxc5
- Tries
- 1.Kf1?
- 1...Rxc5
- 2.Qf3#
- 2.Qe4#
- 1...Rxg6
- 2.Qd5#
- 1...Rf6
- 2.Qe4#
- 1...Ra6
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rb6
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rd6
- 2.Qf3#
- 2.Qe4#
- 1...Re6
- 2.Qf3#
- 1...Rc7
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rc8
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Sg4
- 2.Bxg4#
- 1...Sg8
- 2.Bg4#
- 1...b2
- 2.Bc2#
- 1...Bd7!
- 1...Rxc5
- 1.Kg1?
- 1...Rxc5
- 2.Qf3#
- 2.Qe4#
- 1...Rxg6
- 2.Qd5#
- 1...Rf6
- 2.Qe4#
- 1...Ra6
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rb6
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rd6
- 2.Qf3#
- 2.Qe4#
- 1...Re6
- 2.Qf3#
- 1...Rc7
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rc8
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Sg4
- 2.Bxg4#
- 1...Sg8
- 2.Bg4#
- 1...b2
- 2.Bc2#
- 1...Bd7!
- 1...Rxc5
- 1.Kh1?
- 1...Rxc5
- 2.Qf3#
- 2.Qe4#
- 1...Rxg6
- 2.Qd5#
- 1...Rf6
- 2.Qe4#
- 1...Ra6
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rb6
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rd6
- 2.Qf3#
- 2.Qe4#
- 1...Re6
- 2.Qf3#
- 1...Rc7
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rc8
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Sg4
- 2.Bxg4#
- 1...Sg8
- 2.Bg4#
- 1...b2
- 2.Bc2#
- 1...Bd7!
- 1...Rxc5
- 1.Kf2?
- 1...Sg4+
- 2.Bxg4#
- 1...Rxc5
- 2.Qf3#
- 2.Qe4#
- 1...Rxg6
- 2.Qd5#
- 1...Rf6
- 2.Qe4#
- 1...Ra6
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rb6
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rd6
- 2.Qf3#
- 2.Qe4#
- 1...Re6
- 2.Qf3#
- 1...Rc7
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rc8
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Sg8
- 2.Bg4#
- 1...b2
- 2.Bc2#
- 1...Bd7!
- 1...Sg4+
- 1.Kh2?
- 1...Sg4+
- 2.Bxg4#
- 1...Rxc5
- 2.Qf3#
- 2.Qe4#
- 1...Rxg6
- 2.Qd5#
- 1...Rf6
- 2.Qe4#
- 1...Ra6
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rb6
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rd6
- 2.Qf3#
- 2.Qe4#
- 1...Re6
- 2.Qf3#
- 1...Rc7
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rc8
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Sg8
- 2.Bg4#
- 1...b2
- 2.Bc2#
- 1...Bd7!
- 1...Sg4+
- 1.Kh3?
- 1...Rxc5
- 2.Qf3#
- 2.Qe4#
- 1...Rxg6
- 2.Qd5#
- 1...Rf6
- 2.Qe4#
- 1...Ra6
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rb6
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rd6
- 2.Qf3#
- 2.Qe4#
- 1...Re6
- 2.Qf3#
- 1...Rc7
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rc8
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Sg4
- 2.Bxg4#
- 1...Sg8
- 2.Bg4#
- 1...b2
- 2.Bc2#
- 1...Bd7!
- 1...Rxc5
- 1.Sxb3?
- threat
- 2.Bc2#
- 1...Ke4
- 2.Bc2#
- 1...Rxg6
- 2.Qd5#
- 1...Re6
- 2.Qf3#
- 1...Rf6!
- threat
- 1.Bxb3?
- threat
- 2.Bc2#
- 1...Rf6
- 2.Qe4#
- 1...Re6
- 2.Qf3#
- 1...Rxg6!
- threat
- 1.Bf3?
- threat
- 2.Be4#
- 1...Rxg6
- 2.Qd5#
- 1...Rf6
- 2.Qe4#
- 1...Re6!
- threat
- 1.Bb2?
- 1...Rxc5
- 2.Qf3#
- 2.Qe4#
- 1...Rxg6
- 2.Qd5#
- 1...Rf6
- 2.Qe4#
- 1...Ra6
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rb6
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rd6
- 2.Qf3#
- 2.Qe4#
- 1...Re6
- 2.Qf3#
- 1...Rc7
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rc8
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Sg4
- 2.Bxg4#
- 1...Sg8
- 2.Bg4#
- 1...Bd7!
- 1...Rxc5
- 1.Bc3?
- 1...Rxc5
- 2.Qf3#
- 2.Qe4#
- 1...Rxg6
- 2.Qd5#
- 1...Rf6
- 2.Qe4#
- 1...Ra6
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rb6
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rd6
- 2.Qf3#
- 2.Qe4#
- 1...Re6
- 2.Qf3#
- 1...Rc7
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rc8
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Sg4
- 2.Bxg4#
- 1...Sg8
- 2.Bg4#
- 1...b2
- 2.Bc2#
- 1...Bd7!
- 1...Rxc5
- 1.Bg7?
- 1...Rxc5
- 2.Qf3#
- 2.Qe4#
- 1...Rxg6
- 2.Qd5#
- 1...Rf6
- 2.Qe4#
- 1...Ra6
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rb6
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rd6
- 2.Qf3#
- 2.Qe4#
- 1...Re6
- 2.Qf3#
- 1...Rc7
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rc8
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Sg4
- 2.Bxg4#
- 1...Sg8
- 2.Bg4#
- 1...b2
- 2.Bc2#
- 1...Bd7!
- 1...Rxc5
- 1.Bh8?
- 1...Rxc5
- 2.Qf3#
- 2.Qe4#
- 1...Rxg6
- 2.Qd5#
- 1...Rf6
- 2.Qe4#
- 1...Ra6
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rb6
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rd6
- 2.Qf3#
- 2.Qe4#
- 1...Re6
- 2.Qf3#
- 1...Rc7
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rc8
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Sg4
- 2.Bxg4#
- 1...Sg8
- 2.Bg4#
- 1...b2
- 2.Bc2#
- 1...Bd7!
- 1...Rxc5
- 1.Rf6+?
- 1...Kg5
- 2.Se4#
- 1...Rxf6!
- 1...Kg5
- 1.Rxf7+?
- 1...Rf6
- 2.Rfxf6#
- 2.Qe4#
- 2.Qd5#
- 1...Sxf7
- 2.Bg4#
- 1...Bxf7!
- 1...Rf6
- 1.Qxc6?
- threat
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 2.Qe6#
- 2.Qf6#
- 1...Bd7
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 2.Qxd7#
- 2.Qf6#
- 1...Sg4
- 2.Bxg4#
- 2.Qf3#
- 2.Qe4#
- 2.Qe6#
- 1...Sg8
- 2.Bg4#
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 2.Qe6#
- 1...Bxc6+!
- threat
- 1.Qb7?
- 1...Rxc5
- 2.Qf3#
- 2.Qe4#
- 1...Rxg6
- 2.Qd5#
- 1...Rf6
- 2.Qe4#
- 1...Ra6
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rb6
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rd6
- 2.Qf3#
- 2.Qe4#
- 1...Re6
- 2.Qf3#
- 1...Rc7
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Rc8
- 2.Qf3#
- 2.Qe4#
- 2.Qd5#
- 1...Sg4
- 2.Bxg4#
- 1...Sg8
- 2.Bg4#
- 1...b2
- 2.Bc2#
- 1...Bd7!
- 1...Rxc5
- 1.Kf1?
- Keys
- 1.Be2!
- threat
- 2.Bd3#
- 1...Rxg6
- 2.Qd5#
- 1...Rf6
- 2.Qe4#
- 1...Re6
- 2.Qf3#
- threat
- 1.Be2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 3
- Sets
- R(c);OGATE::QAR2(K)
- R(c);N_SPINS(e),OGATE::QAB1(K)
- R(c);OGATE,P_PINP(D),XR(I)::QAR2(K)
- S(d);N_GUARD::B(A),XS(d)
- S(d);N_GUARD::B(A)
- P(a);N_GUARD::B(A)
- Tries
- Try
- K(C);S_FLIGHT
- Vars
- R(c);OGATE,XR(I)::QAR2(K)
- R(c);N_SPINS(e),OGATE::QAB1(K)
- R(c);OGATE::QAR2(K)
- S(d);N_GUARD::B(A),XS(d)
- S(d);N_GUARD::B(A)
- P(a);N_GUARD::B(A)
- Refutation
- B(f);
- Try
- K(C);P-FLIGHT
- Vars
- R(c);OGATE,P_PINP(D),XR(I)::QAR2(K)
- R(c);N_SPINS(e),OGATE::QAB1(K)
- R(c);OGATE::QAR2(K)
- S(d);N_GUARD::B(A),XS(d)
- S(d);N_GUARD::B(A)
- P(a);N_GUARD::B(A)
- Refutation
- B(f);
- Try
- K(C);S_FLIGHT
- Vars
- R(c);OGATE,XR(I)::QAR2(K)
- R(c);N_SPINS(e),OGATE::QAB1(K)
- R(c);OGATE::QAR2(K)
- S(d);N_GUARD::B(A),XS(d)
- S(d);N_GUARD::B(A)
- P(a);N_GUARD::B(A)
- Refutation
- B(f);
- Try
- K(C);P-FLIGHT
- Vars
- S(d);CHECK,N_GUARD::B(A),XS(d)
- R(c);OGATE,XR(I)::QAR2(K)
- R(c);N_SPINS(e),OGATE::QAB1(K)
- R(c);OGATE::QAR2(K)
- S(d);N_GUARD::B(A)
- P(a);N_GUARD::B(A)
- Refutation
- B(f);
- Try
- K(C);P-FLIGHT
- Vars
- S(d);CHECK,N_GUARD::B(A),XS(d)
- R(c);OGATE,XR(I)::QAR2(K)
- R(c);N_SPINS(e),OGATE::QAB1(K)
- R(c);OGATE::QAR2(K)
- S(d);N_GUARD::B(A)
- P(a);N_GUARD::B(A)
- Refutation
- B(f);
- Try
- K(C);S_FLIGHT
- Vars
- R(c);OGATE,XR(I)::QAR2(K)
- R(c);N_SPINS(e),OGATE::QAB1(K)
- R(c);OGATE::QAR2(K)
- S(d);N_GUARD::B(A),XS(d)
- S(d);N_GUARD::B(A)
- P(a);N_GUARD::B(A)
- Refutation
- B(f);
- Try
- S(B);XP(a)
- Threat
- B(A)
- Vars
- K(b);N_SPINS(e),P_SPINR(c),S_FLIGHT::B(A)
- R(c);OGATE,P_PINP(D),XR(I)::QAR2(K)
- R(c);OGATE::QAR2(K)
- Refutation
- R(c);N_SPINS(e)
- Try
- B(A);XP(a)
- Threat
- B(A)
- Vars
- R(c);N_SPINS(e),OGATE::QAB1(K)
- R(c);OGATE::QAR2(K)
- Refutation
- R(c);P_PINP(D),XR(I)
- Try
- B(A);
- Threat
- B(A)
- Vars
- R(c);OGATE,P_PINP(D),XR(I)::QAR2(K)
- R(c);N_SPINS(e),OGATE::QAB1(K)
- Refutation
- R(c);
- Try
- B(F);
- Vars
- R(c);OGATE,P_PINP(D),XR(I)::QAR2(K)
- R(c);N_SPINS(e),OGATE::QAB1(K)
- R(c);OGATE::QAR2(K)
- S(d);N_GUARD::B(A),XS(d)
- S(d);N_GUARD::B(A)
- Refutation
- B(f);
- Try
- B(F);
- Vars
- R(c);OGATE,P_PINP(D),XR(I)::QAR2(K)
- R(c);N_SPINS(e),OGATE::QAB1(K)
- R(c);OGATE::QAR2(K)
- S(d);N_GUARD::B(A),XS(d)
- S(d);N_GUARD::B(A)
- P(a);N_GUARD::B(A)
- Refutation
- B(f);
- Try
- B(F);
- Vars
- R(c);OGATE,P_PINP(D),XR(I)::QAR2(K)
- R(c);N_SPINS(e),OGATE::QAB1(K)
- R(c);OGATE::QAR2(K)
- S(d);N_GUARD::B(A),XS(d)
- S(d);N_GUARD::B(A)
- P(a);N_GUARD::B(A)
- Refutation
- B(f);
- Try
- B(F);
- Vars
- R(c);OGATE,P_PINP(D),XR(I)::QAR2(K)
- R(c);N_SPINS(e),OGATE::QAB1(K)
- R(c);OGATE::QAR2(K)
- S(d);N_GUARD::B(A),XS(d)
- S(d);N_GUARD::B(A)
- P(a);N_GUARD::B(A)
- Refutation
- B(f);
- Try
- R(I);CHECK,N_PINS(e)
- Vars
- K(b);P-FLIGHT::S(B)
- Refutation
- R(c);XR(I)
- Try
- R(L);CHECK,XS(e)
- Vars
- S(d);XR(L)::B(A)
- Refutation
- B(f);XR(L)
- Try
- Q(K);XR(c)
- Threat
- DUALS(5)
- Refutation
- B(f);CHECK,XQ(K)
- Try
- Q(K);
- Vars
- R(c);OGATE,P_PINP(D),XR(I)::QAR2(K)
- R(c);N_SPINS(e),OGATE::QAB1(K)
- R(c);OGATE::QAR2(K)
- S(d);N_GUARD::B(A),XS(d)
- S(d);N_GUARD::B(A)
- P(a);N_GUARD::B(A)
- Refutation
- B(f);
- Try
- Actual
- B(A);
- Threat
- B(A)
- Vars
- R(c);OGATE,P_PINP(D),XR(I)::QAR2(K)
- R(c);N_SPINS(e),OGATE::QAB1(K)
- R(c);OGATE::QAR2(K)
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).