MESON Chess Problem Database
Problem Display
PID: 55369 (b1BB1bn1/prq1Np2/3k1P2/2pN3n/2Q2P2/2RK2p1/3R2p1/8 w - - 0 1)
Burda, Josef
Troll, 1992
#2
10 + 12
SOLUTION
- SOUND
- Sets
- 1...Qb8
- 2.Qxc5#
- 1...Qxd8
- 2.Qxc5#
- 1...Qc6
- 2.Sf5#
- 1...Qxe7
- 2.Qxc5#
- 1...Rb1
- 2.Bxc7#
- 1...Rb2
- 2.Bxc7#
- 1...Rb3
- 2.Bxc7#
- 1...Rb4
- 2.Bxc7#
- 1...Rb5
- 2.Bxc7#
- 1...Rb6
- 2.Bxc7#
- 1...Rb8
- 2.Bxc7#
- 1...Sxf4+
- 2.Qxf4#
- 1...Qb8
- Tries
- 1.Kc2?
- threat
- 2.Se3#
- 2.Sb4#
- 2.Sb6#
- 2.Sxc7#
- 1...Qxd8
- 2.Qxc5#
- 1...Qxe7
- 2.Sb4#
- 2.Sxe7#
- 2.Qxc5#
- 1...Qxc8
- 2.Se3#
- 2.Sb4#
- 2.Sb6#
- 2.Sc7#
- 1...Bxe7
- 2.Sb4#
- 2.Sxe7#
- 1...Sxf4
- 2.Qxf4#
- 1...Shxf6
- 2.Sxf6#
- 1...Sgxf6
- 2.Sxf6#
- 1...Sxe7
- 2.Sxe7#
- 1...Qd7
- 2.Se3#
- 2.Sb4#
- 2.Sb6#
- 2.Sc7#
- 1...g1Q
- 2.Se3#
- 1...g1B
- 2.Se3#
- 1...Qa5
- 2.Se3#
- 2.Sb4#
- 2.Sb6#
- 2.Sc7#
- 1...Qb6
- 2.Se3#
- 2.Sb4#
- 2.Sxb6#
- 2.Sc7#
- 1...Qb8
- 2.Se3#
- 2.Sb4#
- 2.Sb6#
- 2.Sc7#
- 2.Qxc5#
- 1...Qc6
- 2.Sf5#
- 1...Rb1
- 2.Bxc7#
- 1...Rb3
- 2.Bxc7#
- 1...Rb4
- 2.Bxc7#
- 1...Rb5
- 2.Bxc7#
- 1...Rb6
- 2.Bxc7#
- 1...Rb8
- 2.Bxc7#
- 1...Rb2+!
- threat
- 1.Ke2?
- threat
- 2.Se3#
- 2.Sb4#
- 2.Sb6#
- 2.Sxc7#
- 1...Qxe7+
- 2.Sxe7#
- 1...Sxf4+
- 2.Qxf4#
- 1...Qxd8
- 2.Qxc5#
- 1...Qxc8
- 2.Se3#
- 2.Sb4#
- 2.Sb6#
- 2.Sc7#
- 1...Bxe7
- 2.Sb4#
- 2.Sxe7#
- 1...Shxf6
- 2.Sxf6#
- 1...Sgxf6
- 2.Sxf6#
- 1...Sxe7
- 2.Sxe7#
- 1...Qd7
- 2.Se3#
- 2.Sb4#
- 2.Sb6#
- 2.Sc7#
- 1...g1Q
- 2.Se3#
- 1...g1B
- 2.Se3#
- 1...Qa5
- 2.Se3#
- 2.Sb4#
- 2.Sb6#
- 2.Sc7#
- 1...Qb6
- 2.Se3#
- 2.Sb4#
- 2.Sxb6#
- 2.Sc7#
- 1...Qb8
- 2.Se3#
- 2.Sb4#
- 2.Sb6#
- 2.Sc7#
- 2.Qxc5#
- 1...Qc6
- 2.Sf5#
- 1...Rb1
- 2.Bxc7#
- 1...Rb2
- 2.Bxc7#
- 1...Rb3
- 2.Bxc7#
- 1...Rb4
- 2.Bxc7#
- 1...Rb5
- 2.Bxc7#
- 1...Rb6
- 2.Bxc7#
- 1...Rb8
- 2.Bxc7#
- 1...g1S+!
- threat
- 1.Se3?
- threat
- 2.Kc2#
- 2.Ke2#
- 2.Ke4#
- 2.S3f5#
- 2.Qd5#
- 1...Sxf4+
- 2.Qxf4#
- 1...Qxd8
- 2.Qxc5#
- 1...Qxe7
- 2.Qd5#
- 2.Qxc5#
- 1...Qxc8
- 2.Kc2#
- 2.Ke2#
- 2.Ke4#
- 2.Qd5#
- 1...Bxe7
- 2.Qd5#
- 1...Shxf6
- 2.S3f5#
- 1...Sgxf6
- 2.S3f5#
- 1...g1S
- 2.Kc2#
- 2.Ke4#
- 2.S3f5#
- 2.Qd5#
- 1...Qc6
- 2.S3f5#
- 2.S7f5#
- 1...Qd7
- 2.Kc2#
- 2.Ke2#
- 2.Ke4#
- 2.Qd5#
- 1...Rb1
- 2.S3f5#
- 1...Rb2
- 2.S3f5#
- 1...Rb3
- 2.S3f5#
- 1...Rb4
- 2.S3f5#
- 1...Rb5
- 2.S3f5#
- 1...Rb6
- 2.S3f5#
- 1...Rb8
- 2.S3f5#
- 1...Sg7
- 2.Kc2#
- 2.Ke2#
- 2.Ke4#
- 2.Qd5#
- 1...Sh6
- 2.Kc2#
- 2.Ke2#
- 2.Ke4#
- 2.Qd5#
- 1...Sxe7!
- threat
- 1.Sxc7?
- threat
- 2.Kc2#
- 2.Ke2#
- 2.Ke3#
- 2.Ke4#
- 2.Se8#
- 2.Qd5#
- 2.Qxc5#
- 1...Sxf4+
- 2.Qxf4#
- 1...Bxe7
- 2.Qd5#
- 2.Qxc5#
- 1...Shxf6
- 2.Qxc5#
- 1...Sgxf6
- 2.Qxc5#
- 1...Sxe7
- 2.Qxc5#
- 1...g1Q
- 2.Se8#
- 2.Qd5#
- 1...g1S
- 2.Kc2#
- 2.Ke3#
- 2.Ke4#
- 2.Se8#
- 2.Qd5#
- 2.Qxc5#
- 1...g1B
- 2.Se8#
- 2.Qd5#
- 1...Rb1
- 2.Se8#
- 2.Qxc5#
- 1...Rb2
- 2.Se8#
- 2.Qxc5#
- 1...Rb3
- 2.Se8#
- 2.Qxc5#
- 1...Rb4
- 2.Se8#
- 2.Qxc5#
- 1...Rb5
- 2.Sxb5#
- 2.Se8#
- 1...Rb6
- 2.Se8#
- 2.Qxc5#
- 1...Rb8
- 2.Se8#
- 2.Qxc5#
- 1...Sg7
- 2.Kc2#
- 2.Ke2#
- 2.Ke3#
- 2.Ke4#
- 2.Qd5#
- 2.Qxc5#
- 1...Rxc7!
- threat
- 1.Qa6+?
- 1...Qc6
- 2.Qxc6#
- 1...Rb6
- 2.Bxc7#
- 1...Qb6!
- 1...Qc6
- 1.Kc2?
- Keys
- 1.Ke4!
- threat
- 2.Se3#
- 2.Sb4#
- 2.Sb6#
- 2.Sxc7#
- 1...Qxe7+
- 2.Sxe7#
- 1...Shxf6+
- 2.Sxf6#
- 1...Sgxf6+
- 2.Sxf6#
- 1...Qxd8
- 2.Qxc5#
- 1...Qxc8
- 2.Se3#
- 2.Sb4#
- 2.Sb6#
- 2.Sc7#
- 1...Bxe7
- 2.Sb4#
- 2.Sxe7#
- 1...Sxf4
- 2.Sxf4#
- 1...Sxe7
- 2.Sxe7#
- 1...Qd7
- 2.Se3#
- 2.Sb4#
- 2.Sb6#
- 2.Sc7#
- 1...g1Q
- 2.Se3#
- 1...g1B
- 2.Se3#
- 1...Qa5
- 2.Se3#
- 2.Sb4#
- 2.Sb6#
- 2.Sc7#
- 1...Qb6
- 2.Se3#
- 2.Sb4#
- 2.Sxb6#
- 2.Sc7#
- 1...Qb8
- 2.Se3#
- 2.Sb4#
- 2.Sb6#
- 2.Sc7#
- 2.Qxc5#
- 1...Qc6
- 2.Sf5#
- 1...Rb1
- 2.Bxc7#
- 1...Rb2
- 2.Bxc7#
- 1...Rb3
- 2.Bxc7#
- 1...Rb4
- 2.Bxc7#
- 1...Rb5
- 2.Bxc7#
- 1...Rb6
- 2.Bxc7#
- 1...Rb8
- 2.Bxc7#
- threat
- 1.Ke4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 5
- REMOVED MATES = 1
- Sets
- Q(h);N_GUARD::QAB1(D),XP(c)
- Q(h);N_GUARD,XB(J)::QAB1(D),XP(c)
- Q(h);SBLOCK::S(H)
- Q(h);N_GUARD,XS(H)::QAB1(D),XP(c)
- R(g);N_GUARD::B(J),XQ(h)
- R(g);N_GUARD,P_PINR(B)::B(J),XQ(h)
- S(d);CHECK,OGATE,XP(E)::QAB(D),XS(d)
- Tries
- Try
- K(C);S_FLIGHT
- Threat
- DUALS(4)
- Vars
- Q(h);N_GUARD,XB(J)::QAB1(D),XP(c)
- S(d);OGATE,XP(E)::QAB(D),XS(d)
- S(d);XP(G)::R(A)+S(F),XS(d)
- S(l);XP(G)::R(A)+S(F),XS(l)
- S(l);XS(H)::R(A)+S(F),XS(l)
- P(a);::R(A)+S(F)
- Q(h);SBLOCK::S(H)
- R(g);N_GUARD::B(J),XQ(h)
- Refutation
- R(g);CHECK
- Try
- K(C);S_FLIGHT
- Threat
- DUALS(4)
- Vars
- Q(h);CHECK,XS(H)::R(A)+S(F),XQ(h)
- S(d);CHECK,OGATE,XP(E)::QAB(D),XS(d)
- Q(h);N_GUARD,XB(J)::QAB1(D),XP(c)
- S(d);XP(G)::R(A)+S(F),XS(d)
- S(l);XP(G)::R(A)+S(F),XS(l)
- S(l);XS(H)::R(A)+S(F),XS(l)
- P(a);::R(A)+S(F)
- Q(h);SBLOCK::S(H)
- R(g);N_GUARD::B(J),XQ(h)
- R(g);N_GUARD,P_PINR(A)::B(J),XQ(h)
- Refutation
- P(a);CHECK
- Try
- S(F);
- Threat
- DUALS(5)
- Vars
- S(d);CHECK,OGATE,XP(E)::QAB(D),XS(d)
- Q(h);N_GUARD,XB(J)::QAB1(D),XP(c)
- B(k);XS(H)::QAR1(D)
- S(d);XP(G)::S(F)
- S(l);XP(G)::S(F)
- R(g);::S(F)
- R(g);P_PINR(B)::S(F)
- Refutation
- S(l);XS(H)
- Try
- S(F);XQ(h)
- Threat
- DUALS(7)
- Vars
- S(d);CHECK,OGATE,XP(E)::QAB(D),XS(d)
- S(d);XP(G)::QAB1(D),XP(c)
- S(l);XP(G)::QAB1(D),XP(c)
- S(l);XS(H)::QAB1(D),XP(c)
- Refutation
- R(g);XS(F)
- Try
- Q(D);CHECK
- Vars
- Q(h);N_GUARD,P_SPINQ(h)::QAR1(D),XQ(h)
- R(g);P_SPINR(g)::B(J),XQ(h)
- Refutation
- Q(h);P_SPINQ(h)
- Try
- Actual
- K(C);S_FLIGHT
- Threat
- DUALS(4)
- Vars
- Q(h);CHECK,XS(H)::R(A)+S(F),XQ(h)
- S(d);CHECK,XP(G)::R(A)+S(F),XS(d)
- S(l);CHECK,XP(G)::R(A)+S(F),XS(l)
- Q(h);N_GUARD,XB(J)::QAB1(D),XP(c)
- S(d);XP(E)::R(A)+S(F),XS(d)
- S(l);XS(H)::R(A)+S(F),XS(l)
- P(a);::R(A)+S(F)
- Q(h);P_PINS(F),SBLOCK::S(H)
- R(g);N_GUARD,P_PINS(F)::B(J),XQ(h)
- R(g);N_GUARD,P_PINQ(D),P_PINS(F)::B(J),XQ(h)
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).