MESON Chess Problem Database
Problem Display
PID: 244973 (BK6/PRP1PNn1/qP4Q1/2pk1r1R/2p5/4P2n/1N3P2/8 w - - 0 1)
Dyachuk, Vasyl Vasilovich
The Problemist, 2020
#2
13 + 7
SOLUTION
- SOUND
- Sets
- 1...Qxb7+
- 2.Bxb7#
- 1...Qxb6
- 2.Rxb6#
- 1...Qxa7+
- 2.Rxa7#
- 1...Re5
- 2.Rxe5#
- 1...Se6
- 2.Qg2#
- 1...Qxb7+
- Tries
- 1.Rxf5+?
- 1...Ke4
- 2.Sd6#
- 1...Sxf5!
- 1...Ke4
- 1.f3?
- threat
- 2.Qd6#
- 1...Qxb7+
- 2.Bxb7#
- 1...Qxa7+
- 2.Rxa7#
- 1...Qxb6
- 2.Rxb6#
- 1...Se8
- 2.Rxf5#
- 1...Se6!
- threat
- 1.c8S?
- threat
- 2.Rd7#
- 1...Qxb7+
- 2.Bxb7#
- 1...Qxa7+
- 2.Rxa7#
- 1...Qxb6
- 2.Rxb6#
- 1...Ke4!
- threat
- 1.c8B?
- threat
- 2.Rd7#
- 2.Qg2#
- 1...Qxb7+
- 2.Baxb7#
- 2.Bcxb7#
- 1...Qxa7+
- 2.Rxa7#
- 1...Qxb6
- 2.Rxb6#
- 2.Qg2#
- 1...Sxf2
- 2.Rd7#
- 1...Sxh5
- 2.Rd7#
- 2.Qe6#
- 1...Rg5
- 2.Rd7#
- 1...Sg1
- 2.Rd7#
- 1...Sf4
- 2.Rd7#
- 1...Sg5
- 2.Rd7#
- 1...Ke4!
- threat
- 1.c8R?
- threat
- 2.Rd7#
- 2.Qc6#
- 1...Qxb7+
- 2.Bxb7#
- 1...Qxa7+
- 2.Rxa7#
- 1...Qxb6
- 2.Rxb6#
- 1...Qb5
- 2.Rd7#
- 1...Qa4
- 2.Rd7#
- 1...Se6
- 2.Rd7#
- 2.Qxf5#
- 2.Qg2#
- 1...Ke4!
- threat
- 1.e8Q?
- threat
- 2.Qec6#
- 2.Qg2#
- 2.Qgc6#
- 2.Qd6#
- 1...Qxb7+
- 2.Bxb7#
- 1...Qxa7+
- 2.Rxa7#
- 1...Qxb6
- 2.Rxb6#
- 2.Qg2#
- 1...Sxf2
- 2.Qec6#
- 2.Qgc6#
- 2.Qd6#
- 1...Sxh5
- 2.Qxf5#
- 2.Qec6#
- 2.Qgc6#
- 2.Qd6#
- 2.Qge6#
- 2.Qee6#
- 1...Se6
- 2.Qxf5#
- 2.Qg2#
- 2.Qgxe6#
- 2.Qexe6#
- 1...Qb5
- 2.Qg2#
- 2.Qd6#
- 1...Qa4
- 2.Qg2#
- 2.Qd6#
- 1...Re5
- 2.Rxe5#
- 2.Qec6#
- 2.Qd7#
- 2.Qg2#
- 2.Qgc6#
- 2.Qxe5#
- 2.Qd8#
- 1...Rg5
- 2.Qge4#
- 2.Qec6#
- 2.Qd7#
- 2.Qgc6#
- 2.Qd6#
- 2.Qee4#
- 2.Qd8#
- 1...Sg1
- 2.Qec6#
- 2.Qgc6#
- 2.Qd6#
- 1...Sf4
- 2.Qec6#
- 2.Qgc6#
- 2.Qd6#
- 1...Sg5
- 2.Qec6#
- 2.Qgc6#
- 2.Qd6#
- 1...Sxe8!
- threat
- 1.e8R?
- threat
- 2.Qg2#
- 2.Qd6#
- 1...Qxb7+
- 2.Bxb7#
- 1...Qxa7+
- 2.Rxa7#
- 1...Qxb6
- 2.Rxb6#
- 2.Qg2#
- 1...Sxf2
- 2.Qd6#
- 1...Sxh5
- 2.Qd6#
- 2.Qe6#
- 1...Se6
- 2.Qg2#
- 2.Qxe6#
- 1...Re5
- 2.Rhxe5#
- 2.Rexe5#
- 2.Rd8#
- 2.Qg2#
- 1...Rg5
- 2.Rd8#
- 2.Qe4#
- 2.Qd6#
- 1...Sg1
- 2.Qd6#
- 1...Sf4
- 2.Qd6#
- 1...Sg5
- 2.Qd6#
- 1...Sxe8!
- threat
- 1.Rxf5+?
- Keys
- 1.c8Q!
- threat
- 2.Rd7#
- 2.Qg2#
- 2.Qgc6#
- 2.Qcc6#
- 1...Qxb7+
- 2.Bxb7#
- 2.Qxb7#
- 1...Qxa7+
- 2.Rxa7#
- 1...Ke4
- 2.Qcc6#
- 1...Qxb6
- 2.Rxb6#
- 2.Qg2#
- 1...Sxf2
- 2.Rd7#
- 2.Qgc6#
- 2.Qcc6#
- 1...Sxh5
- 2.Rd7#
- 2.Qgxf5#
- 2.Qcxf5#
- 2.Qce6#
- 2.Qgc6#
- 2.Qge6#
- 2.Qcc6#
- 1...Qb5
- 2.Rd7#
- 2.Qg2#
- 1...Qa4
- 2.Rd7#
- 2.Qg2#
- 1...Rg5
- 2.Rd7#
- 2.Qd7#
- 2.Qgc6#
- 2.Qcc6#
- 2.Qd8#
- 1...Sg1
- 2.Rd7#
- 2.Qgc6#
- 2.Qcc6#
- 1...Sf4
- 2.Rd7#
- 2.Qgc6#
- 2.Qcc6#
- 1...Sg5
- 2.Rd7#
- 2.Qgc6#
- 2.Qcc6#
- 1...Se6
- 2.Rd7#
- 2.Qxf5#
- 2.Qcxe6#
- 2.Qg2#
- 2.Qgxe6#
- threat
- 1.c8Q!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 4
- Sets
- Q(f);CHECK,OGATE,P_SPINQ(f),XR(H)::B(L),XQ(f)
- Q(f);OGATE,P_PINR(H),XP(E)::B(L)+R(H),XQ(f)
- Q(f);CHECK,OGATE,XP(G)::B(L)+R(H),XQ(f)
- R(e);OGATE::R1(D),XR(e)
- S(g);SBLOCK::QAB(F)
- Tries
- Try
- R(D);CHECK,XR(e)
- Vars
- K(d);S_FLIGHT::S(K)
- Refutation
- S(g);XR(D)
- Try
- P(B);
- Threat
- QAR1(F)
- Vars
- Q(f);CHECK,OGATE,P_SPINQ(f),XR(H)::B(L),XQ(f)
- Q(f);CHECK,OGATE,XP(G)::B(L)+R(H),XQ(f)
- Q(f);OGATE,P_PINR(H),XP(E)::B(L)+R(H),XQ(f)
- S(g);N_GUARD::R(D),XR(e)
- Refutation
- S(g);
- Try
- P(I);
- Threat
- B(L)+R(H),DCHECK
- Vars
- Q(f);CHECK,OGATE,P_SPINQ(f),XR(H)::B(L),XQ(f)
- Q(f);CHECK,OGATE,XP(G)::B(L)+R(H),XQ(f)
- Q(f);OGATE,P_PINR(H),XP(E)::B(L)+R(H),XQ(f)
- Refutation
- K(d);S_FLIGHT
- Try
- P(I);
- Threat
- DUALS(2)
- Vars
- Q(f);CHECK,OGATE,XP(G)::B(L)+R(H),XQ(f)
- S(a);XP(B)::B(L)+R(H),DCHECK
- R(e);::B(L)+R(H),DCHECK
- S(a);::B(L)+R(H),DCHECK
- S(a);N_SPINR(e)::B(L)+R(H),DCHECK
- Refutation
- K(d);S_FLIGHT
- Try
- P(I);
- Threat
- DUALS(2)
- Vars
- Q(f);CHECK,OGATE,P_SPINQ(f),XR(H)::B(L),XQ(f)
- Q(f);CHECK,OGATE,XP(G)::B(L)+R(H),XQ(f)
- Q(f);OGATE,P_PINR(H),XP(E)::B(L)+R(H),XQ(f)
- Q(f);::B(L)+R(H),DCHECK
- Refutation
- K(d);S_FLIGHT
- Try
- P(J);
- Threat
- DUALS(4)
- Vars
- Q(f);CHECK,OGATE,P_SPINQ(f),XR(H)::B(L),XQ(f)
- Q(f);CHECK,OGATE,XP(G)::B(L)+R(H),XQ(f)
- Refutation
- S(g);XQ(J)
- Try
- P(J);
- Threat
- DUALS(2)
- Vars
- Q(f);CHECK,OGATE,P_SPINQ(f),XR(H)::B(L),XQ(f)
- Q(f);CHECK,OGATE,XP(G)::B(L)+R(H),XQ(f)
- S(a);XP(B)::QAR1(F)
- S(a);::QAR1(F)
- S(a);N_SPINR(e)::QAR1(F)
- Refutation
- S(g);XR(J)
- Try
- Actual
- P(I);
- Threat
- DUALS(4)
- Vars
- Q(f);CHECK,OGATE,XP(G)::B(L)+R(H),XQ(f)
- K(d);S_FLIGHT::QAB(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).