MESON Chess Problem Database
Problem Display
PID: 70831 (2BqN3/1n1PpPRn/1N1PkP2/5p2/5P2/8/Rp2p1K1/BQ6 w - - 0 1)
Wirtanen, Erkki Aukusti
2nd HM., Segal MT, 1962
#2
13 + 8
SOLUTION
- SOUND
- Sets
- 1...Qc7
- 2.d8S#
- 1...Qxd7
- 2.Bxd7#
- 1...Qxc8
- 2.dxc8Q#
- 2.dxc8B#
- 1...Qxe8
- 2.dxe8S#
- 1...Sg5
- 2.f8S#
- 1...Sxf6
- 2.f8S#
- 1...bxa1Q
- 2.Qb3#
- 1...bxa1S
- 2.Rxe2#
- 1...bxa1B
- 2.Qb3#
- 1...bxa1R
- 2.Rxe2#
- 2.Qb3#
- 1...e1Q
- 2.Qxe1#
- 1...e1S+
- 2.Qxe1#
- 1...e1B
- 2.Qxe1#
- 1...e1R
- 2.Qxe1#
- 1...Qc7
- Tries
- 1.Rxh7?
- threat
- 2.f8S#
- 1...e1S+
- 2.Qxe1#
- 1...Qxe8
- 2.dxe8S#
- 1...Qxb6!
- threat
- 1.Qd3?
- threat
- 2.Qxe2#
- 2.Qc4#
- 2.Qb3#
- 2.Qe3#
- 2.Qd5#
- 1...Qxb6
- 2.Qc4#
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Qxc8
- 2.Qxe2#
- 2.Qe3#
- 2.Qd5#
- 2.dxc8Q#
- 2.dxc8B#
- 1...Qxe8
- 2.dxe8S#
- 1...Sxd6
- 2.Qd5#
- 1...Sxf6
- 2.f8S#
- 1...bxa1Q
- 2.Qc4#
- 2.Qb3#
- 2.Qd5#
- 1...bxa1S
- 2.Rxe2#
- 2.Qxe2#
- 2.Qc4#
- 2.Qe3#
- 2.Qd5#
- 1...bxa1B
- 2.Qc4#
- 2.Qb3#
- 2.Qd5#
- 1...exd6
- 2.Qxe2#
- 2.Qe3#
- 2.Qd5#
- 1...b1Q
- 2.Rxe2#
- 2.Qc4#
- 2.Qd5#
- 1...b1B
- 2.Rxe2#
- 2.Qc4#
- 2.Qb3#
- 2.Qd5#
- 1...b1R
- 2.Rxe2#
- 2.Qxe2#
- 2.Qc4#
- 2.Qe3#
- 2.Qd5#
- 1...e1Q
- 2.Qc4#
- 2.Qb3#
- 2.Qd5#
- 1...e1B
- 2.Qe2#
- 2.Qc4#
- 2.Qb3#
- 2.Qe3#
- 2.Qd5#
- 1...e1R
- 2.Qc4#
- 2.Qb3#
- 2.Qd5#
- 1...Qc7
- 2.Qxe2#
- 2.Qe3#
- 2.Qd5#
- 2.d8S#
- 1...Sa5
- 2.Qxe2#
- 2.Qe3#
- 2.Qd5#
- 1...Sc5
- 2.Qc4#
- 2.Qd5#
- 1...Sg5
- 2.Qc4#
- 2.Qb3#
- 2.Qd5#
- 2.f8S#
- 1...e1S+!
- threat
- 1.Qxb2?
- threat
- 2.Qe5#
- 2.Qxe2#
- 2.Qb3#
- 1...Qxb6
- 2.Qe5#
- 1...Qxc8
- 2.Qe5#
- 2.Qxe2#
- 2.dxc8Q#
- 2.dxc8B#
- 1...Qxe8
- 2.Qe5#
- 2.dxe8S#
- 1...Sxd6
- 2.Qe5#
- 1...Sxf6
- 2.Qe5#
- 2.f8S#
- 1...exd6
- 2.Qxe2#
- 1...exf6
- 2.Qxe2#
- 2.Qb3#
- 1...e1Q
- 2.Qb3#
- 1...e1B
- 2.Qe5#
- 2.Qe2#
- 2.Qb3#
- 1...e1R
- 2.Qb3#
- 1...Qc7
- 2.Qe5#
- 2.Qxe2#
- 2.d8S#
- 1...Sa5
- 2.Qe5#
- 2.Qxe2#
- 1...Sc5
- 2.Qe5#
- 1...Sg5
- 2.Qe5#
- 2.Qb3#
- 2.f8S#
- 1...e1S+!
- threat
- 1.Rxh7?
- Keys
- 1.dxe7!
- 1...e1S+
- 2.Qxe1#
- 1...Qxb6
- 2.d8Q#
- 2.d8R#
- 1...Qxe7
- 2.d8S#
- 1...Qxd7
- 2.Bxd7#
- 1...Qxc8
- 2.dxc8Q#
- 2.dxc8B#
- 1...Qxe8
- 2.dxe8S#
- 1...Sxf6
- 2.f8S#
- 1...bxa1Q
- 2.Qb3#
- 1...bxa1S
- 2.Rxe2#
- 1...bxa1B
- 2.Qb3#
- 1...bxa1R
- 2.Rxe2#
- 2.Qb3#
- 1...e1Q
- 2.Qxe1#
- 1...e1B
- 2.Qxe1#
- 1...e1R
- 2.Qxe1#
- 1...Qc7
- 2.d8S#
- 1...Sa5
- 2.exd8S#
- 1...Sc5
- 2.exd8S#
- 1...Sd6
- 2.exd8S#
- 1...Sg5
- 2.f8S#
- 1...Sf8
- 2.exf8S#
- 1...e1S+
- 1.dxe7!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 0
- Sets
- Q(h);OGATE::P=S
- Q(h);OGATE,P_SPINQ(h),XP(I)::B(L),XQ(h)
- Q(h);OGATE,XB(L)::PXQ(h)=Q
- Q(h);OGATE,XS(M)::PXQ(h)=S
- S(g);N_GUARD::P=S
- S(g);N_GUARD,XP(H)::P=S
- P(a);OGATE,XB(A)::QAB(B)
- P(a);OGATE,XB(A)::R(C),XP(b)
- P(b);OGATEB::QAR(B),XQ(b)
- P(b);CHECK,OGATEB::QAR(B),XS(b)
- P(b);OGATEB::QAR(B),XB(b)
- P(b);OGATEB::QAR(B),XR(b)
- Tries
- Try
- R(K);XS(g)
- Threat
- P=S
- Vars
- P(b);CHECK,OGATEB::QAR(B),XS(b)
- Q(h);OGATE,XS(M)::PXQ(h)=S
- Refutation
- Q(h);XS(F)
- Try
- Q(B);
- Threat
- DUALS(5)
- Vars
- Q(h);OGATE,XS(M)::PXQ(h)=S
- S(e);XP(G)::QAB1(B)
- S(g);N_GUARD,XP(H)::P=S
- Refutation
- P(b);CHECK
- Try
- Q(B);XP(a)
- Threat
- DUALS(3)
- Vars
- Q(h);XS(F)::QAR1(B)
- S(e);XP(G)::QAR1(B)
- P(f);XP(G)::QAR(B),XP(b)
- P(b);::QAB(B)
- S(e);::QAR1(B)
- Refutation
- P(b);CHECK
- Try
- Actual
- P(G);XP(f)
- Vars
- P(b);CHECK,OGATEB::QAR(B),XS(b)
- Q(h);OGATE,XS(F)::P=Q
- Q(h);OGATE,XP(G)::P=S
- Q(h);OGATE,P_SPINQ(h),XP(I)::B(L),XQ(h)
- Q(h);OGATE,XB(L)::PXQ(h)=Q
- Q(h);OGATE,XS(M)::PXQ(h)=S
- S(g);N_GUARD,XP(H)::P=S
- P(a);OGATE,XB(A)::QAB(B)
- P(a);OGATE,XB(A)::R(C),XP(b)
- P(b);OGATEB::QAR(B),XQ(b)
- P(b);OGATEB::QAR(B),XB(b)
- P(b);OGATEB::QAR(B),XR(b)
- Q(h);OGATE::P=S
- S(e);N_GUARD::PXQ(h)=S
- S(g);N_GUARD::P=S
- S(g);OGATE::PXS(g)=S
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).