MESON Chess Problem Database
Problem Display
PID: 158742 (2n1NK2/2P2Rpb/3Bk1pb/4P1R1/8/2n2QP1/8/8 w - - 0 1)
Evdokimov, Aleksey
Phenix, 1990
#2
9 + 7
SOLUTION
- SOUND
- Sets
- 1...Bxg5
- 2.Sxg7#
- 1...Bg8
- 2.Rxg6#
- 1...Sb1
- 2.Qb3#
- 1...Sd1
- 2.Qb3#
- 1...Sa2
- 2.Qb3#
- 1...Se2
- 2.Qb3#
- 1...Sa4
- 2.Qb3#
- 1...Se4
- 2.Qb3#
- 1...Sb5
- 2.Qb3#
- 1...Sd5
- 2.Qg4#
- 1...Sb6
- 2.Re7#
- 1...Sxd6
- 2.Re7#
- 1...Sa7
- 2.Re7#
- 1...Se7
- 2.Rxe7#
- 1...Bxg5
- Tries
- 1.Sf6?
- threat
- 2.Qg4#
- 1...Sxd6
- 2.Re7#
- 1...Se7
- 2.Rxe7#
- 1...gxf6+!
- threat
- 1.Rf6+?
- 1...Kd7
- 2.e6#
- 1...gxf6+!
- 1...Kd7
- 1.Qd1?
- 1...Bxg5
- 2.Sxg7#
- 1...Sxd6
- 2.Re7#
- 2.Qxd6#
- 1...Se7
- 2.Rxe7#
- 1...Bg8
- 2.Rxg6#
- 1...Sb1
- 2.Qb3#
- 1...Sa2
- 2.Qb3#
- 1...Se2
- 2.Qb3#
- 1...Sa4
- 2.Qb3#
- 1...Se4
- 2.Qb3#
- 1...Sb5
- 2.Qb3#
- 1...Sd5
- 2.Qg4#
- 1...Sb6
- 2.Re7#
- 1...Sa7
- 2.Re7#
- 1...Sxd1!
- 1...Bxg5
- 1.Qg2?
- 1...Bxg5
- 2.Sxg7#
- 1...Sxd6
- 2.Re7#
- 1...Se4
- 2.Qa2#
- 1...Se7
- 2.Rxe7#
- 1...Bg8
- 2.Rxg6#
- 1...Sb1
- 2.Qa2#
- 1...Sd1
- 2.Qa2#
- 1...Sa2
- 2.Qxa2#
- 1...Sa4
- 2.Qa2#
- 1...Sb5
- 2.Qa2#
- 1...Sd5
- 2.Qh3#
- 1...Sb6
- 2.Re7#
- 1...Sa7
- 2.Re7#
- 1...Se2!
- 1...Bxg5
- 1.Qe4?
- 1...Bxg5
- 2.Sxg7#
- 1...Sxd6
- 2.Re7#
- 1...Se7
- 2.Rxe7#
- 1...Bg8
- 2.Rxg6#
- 1...Sb1
- 2.Qc4#
- 1...Sd1
- 2.Qc4#
- 1...Sa2
- 2.Qc4#
- 1...Se2
- 2.Qc4#
- 1...Sa4
- 2.Qc4#
- 1...Sb5
- 2.Qc4#
- 1...Sd5
- 2.Qg4#
- 1...Sb6
- 2.Re7#
- 1...Sa7
- 2.Re7#
- 1...Sxe4!
- 1...Bxg5
- 1.Qb7?
- 1...Bxg5
- 2.Sxg7#
- 1...Sxd6
- 2.Re7#
- 1...Se7
- 2.Rxe7#
- 1...Bg8
- 2.Rxg6#
- 1...Sb1
- 2.Qb3#
- 1...Sd1
- 2.Qb3#
- 1...Sa2
- 2.Qb3#
- 1...Se2
- 2.Qb3#
- 1...Sa4
- 2.Qb3#
- 1...Se4
- 2.Qb3#
- 1...Sd5
- 2.Qxc8#
- 1...Sb6
- 2.Re7#
- 1...Sa7
- 2.Re7#
- 1...Sb5!
- 1...Bxg5
- 1.Qa8?
- 1...Bxg5
- 2.Sxg7#
- 1...Sxd6
- 2.Re7#
- 1...Se7
- 2.Rxe7#
- 1...Bg8
- 2.Rxg6#
- 1...Sb1
- 2.Qa2#
- 1...Sd1
- 2.Qa2#
- 1...Sa2
- 2.Qxa2#
- 1...Se2
- 2.Qa2#
- 1...Se4
- 2.Qa2#
- 1...Sb5
- 2.Qa2#
- 1...Sd5
- 2.Qxc8#
- 1...Sb6
- 2.Re7#
- 1...Sa7
- 2.Re7#
- 1...Sa4!
- 1...Bxg5
- 1.Qd3?
- 1...Bxg5
- 2.Sxg7#
- 1...Sxd6
- 2.Re7#
- 2.Qxd6#
- 1...Se7
- 2.Rxe7#
- 1...Bg8
- 2.Rxg6#
- 1...Sb1
- 2.Qc4#
- 2.Qb3#
- 1...Sd1
- 2.Qc4#
- 2.Qb3#
- 1...Sa2
- 2.Qc4#
- 2.Qb3#
- 1...Se2
- 2.Qc4#
- 2.Qb3#
- 1...Sa4
- 2.Qc4#
- 2.Qb3#
- 1...Se4
- 2.Qc4#
- 2.Qb3#
- 1...Sb5
- 2.Qc4#
- 2.Qb3#
- 1...Sb6
- 2.Re7#
- 1...Sa7
- 2.Re7#
- 1...Sd5!
- 1...Bxg5
- 1.g4?
- 1...Bxg5
- 2.Sxg7#
- 1...Sxd6
- 2.Re7#
- 1...Se4
- 2.Qb3#
- 1...Se7
- 2.Rxe7#
- 1...Bg8
- 2.Rxg6#
- 1...Sb1
- 2.Qb3#
- 1...Sd1
- 2.Qb3#
- 1...Sa2
- 2.Qb3#
- 1...Se2
- 2.Qb3#
- 1...Sa4
- 2.Qb3#
- 1...Sb5
- 2.Qb3#
- 1...Sb6
- 2.Re7#
- 1...Sa7
- 2.Re7#
- 1...Sd5!
- 1...Bxg5
- 1.Sf6?
- Keys
- 1.Qc6!
- 1...Bxg5
- 2.Sxg7#
- 1...Sxd6
- 2.Re7#
- 2.Qxd6#
- 2.c8Q#
- 2.c8B#
- 1...Bg8
- 2.Rxg6#
- 1...Sb1
- 2.Qc4#
- 1...Sd1
- 2.Qc4#
- 1...Sa2
- 2.Qc4#
- 1...Se2
- 2.Qc4#
- 1...Sa4
- 2.Qc4#
- 1...Se4
- 2.Qc4#
- 1...Sb5
- 2.Qc4#
- 1...Sd5
- 2.Qd7#
- 1...Sb6
- 2.Ba3#
- 2.Bb4#
- 2.Bc5#
- 2.Be7#
- 2.Re7#
- 1...Sa7
- 2.Re7#
- 1...Se7
- 2.Bxe7#
- 2.Rxe7#
- 1...Bxg5
- 1.Qc6!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 8
- ADDED MATES = 0
- REMOVED MATES = 3
- Sets
- B(d);N_GUARD,XR(D)::S(H),XP(e)
- B(f);N_GUARD::R(D),XP(c)
- S(a);OGATE::QAB(A)
- S(a);SBLOCK::QAB(A)
- S(g);N_GUARD::R1(G)
- S(g);N_GUARD,XB(E)::R1(G)
- S(g);N_GUARD::R1(G),XS(g)
- Tries
- Try
- S(H);
- Threat
- QAB(A)
- Vars
- S(g);N_GUARD,XB(E)::R1(G)
- S(g);N_GUARD::R1(G),XS(g)
- Refutation
- P(e);CHECK,XS(H)
- Try
- R(G);CHECK
- Vars
- K(b);OGATE,S_FLIGHT::P(C)
- Refutation
- P(e);CHECK,XR(G)
- Try
- Q(A);
- Vars
- B(d);N_GUARD,XR(D)::S(H),XP(e)
- S(g);N_GUARD::R1(G),XS(g)
- B(f);N_GUARD::R(D),XP(c)
- S(a);N_GUARD::QAB(A)
- S(a);SBLOCK::QAB(A)
- S(g);N_GUARD::R1(G)
- Refutation
- S(a);XQ(A)
- Try
- Q(A);
- Vars
- B(d);N_GUARD,XR(D)::S(H),XP(e)
- S(g);N_GUARD,XB(E)::R1(G)
- S(a);N_GUARD::QAB(A)
- S(g);N_GUARD::R1(G),XS(g)
- B(f);N_GUARD::R(D),XP(c)
- S(a);N_GUARD::QAB(A),XS(a)
- S(a);SBLOCK::QAB(A)
- S(g);N_GUARD::R1(G)
- Refutation
- S(a);
- Try
- Q(A);
- Vars
- B(d);N_GUARD,XR(D)::S(H),XP(e)
- S(g);N_GUARD,XB(E)::R1(G)
- S(g);N_GUARD::R1(G),XS(g)
- B(f);N_GUARD::R(D),XP(c)
- S(a);N_GUARD::QAB(A)
- S(a);SBLOCK::QAB(A)
- S(g);N_GUARD::R1(G)
- Refutation
- S(a);XQ(A)
- Try
- Q(A);
- Vars
- B(d);N_GUARD,XR(D)::S(H),XP(e)
- S(g);N_GUARD,XB(E)::R1(G)
- S(g);N_GUARD::R1(G),XS(g)
- B(f);N_GUARD::R(D),XP(c)
- S(a);N_GUARD::QAB(A)
- S(a);SBLOCK::QAB(A),XS(g)
- S(g);N_GUARD::R1(G)
- Refutation
- S(a);
- Try
- Q(A);
- Vars
- B(d);N_GUARD,XR(D)::S(H),XP(e)
- S(g);N_GUARD,XB(E)::R1(G)
- S(g);N_GUARD::R1(G),XS(g)
- B(f);N_GUARD::R(D),XP(c)
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- S(a);SBLOCK::QAB(A),XS(g)
- S(g);N_GUARD::R1(G)
- Refutation
- S(a);
- Try
- Q(A);
- Vars
- B(d);N_GUARD,XR(D)::S(H),XP(e)
- S(g);N_GUARD::R1(G),XS(g)
- B(f);N_GUARD::R(D),XP(c)
- S(g);N_GUARD::R1(G)
- Refutation
- S(a);
- Try
- P(B);
- Vars
- B(d);N_GUARD,XR(D)::S(H),XP(e)
- S(g);N_GUARD,XB(E)::R1(G)
- S(a);OGATE::QAB(A)
- S(g);N_GUARD::R1(G),XS(g)
- B(f);N_GUARD::R(D),XP(c)
- S(g);N_GUARD::R1(G)
- Refutation
- S(a);
- Try
- Actual
- Q(A);
- Vars
- B(d);N_GUARD,XR(D)::S(H),XP(e)
- B(f);N_GUARD::R(D),XP(c)
- S(a);N_GUARD::QAB(A)
- S(a);SBLOCK::QAB1(A)
- S(g);N_GUARD::R1(G)
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).