MESON Chess Problem Database
Problem Display
PID: 278228 (3k2bR/N1pppPr1/6Qn/4R3/B1K5/8/8/b5B1 w - - 0 1)
Godal, Ivar
Stella Polaris, 1972
#2
8 + 8
SOLUTION
- SOUND
- Sets
- 1...c5
- 2.Qb6#
- 1...c6
- 2.Bb6#
- 1...d5+
- 2.Rxd5#
- 1...e6
- 2.Qf6#
- 2.f8Q#
- 1...c5
- Tries
- 1.Rxg8+?
- 1...Sxg8
- 2.f8Q#
- 2.f8R#
- 1...Rxg8!
- 1...Sxg8
- 1.Qa6?
- threat
- 2.Qc8#
- 1...d5+
- 2.Rxd5#
- 1...e6
- 2.f8Q#
- 1...Rg4+!
- threat
- 1.Qb6?
- threat
- 2.Qb8#
- 1...d5+
- 2.Rxd5#
- 1...cxb6
- 2.Bxb6#
- 1...e6
- 2.f8Q#
- 1...Rg4+!
- threat
- 1.Qd6?
- threat
- 2.Qxe7#
- 2.Qxd7#
- 1...Rxf7
- 2.Qxd7#
- 1...Bxe5
- 2.Qxd7#
- 1...cxd6
- 2.Bb6#
- 1...exd6
- 2.Re8#
- 1...Sf5
- 2.Qxd7#
- 1...c5
- 2.Qb8#
- 2.Qb6#
- 2.Qxd7#
- 1...c6
- 2.Bb6#
- 2.Qb8#
- 1...e6
- 2.Qf8#
- 2.Qxd7#
- 2.f8Q#
- 2.f8R#
- 1...Rg4+!
- threat
- 1.Qe6?
- threat
- 2.Qxd7#
- 2.Qxe7#
- 2.f8Q#
- 2.f8R#
- 1...d5+
- 2.Rxd5#
- 2.Qxd5#
- 1...Rxg1
- 2.Qxd7#
- 2.Qxe7#
- 2.f8Q#
- 2.f8R#
- 1...Rxf7
- 2.Qxd7#
- 1...Bxe5
- 2.Qxd7#
- 2.f8Q#
- 2.f8R#
- 1...Sxf7
- 2.Qxd7#
- 2.Qxe7#
- 1...c5
- 2.Qxd7#
- 2.Qb6#
- 1...c6
- 2.Bb6#
- 1...Rg2
- 2.Qxd7#
- 2.Qxe7#
- 2.f8Q#
- 2.f8R#
- 1...Rg3
- 2.Qxd7#
- 2.Qxe7#
- 2.f8Q#
- 2.f8R#
- 1...Rg5
- 2.Qxd7#
- 2.Qxe7#
- 2.f8Q#
- 2.f8R#
- 1...Rg6
- 2.Qxd7#
- 2.Qxe7#
- 2.f8Q#
- 2.f8R#
- 1...Rh7
- 2.Qxd7#
- 2.Qxe7#
- 2.f8Q#
- 2.f8R#
- 1...Bb2
- 2.Qxd7#
- 2.Qxe7#
- 2.f8Q#
- 2.f8R#
- 1...Bc3
- 2.Qxd7#
- 2.Qxe7#
- 2.f8Q#
- 2.f8R#
- 1...Bd4
- 2.Qxd7#
- 2.Qxe7#
- 2.f8Q#
- 2.f8R#
- 1...Sg4
- 2.Qxd7#
- 2.Qxe7#
- 2.f8Q#
- 2.f8R#
- 1...Sf5
- 2.Qxd7#
- 2.f8Q#
- 2.f8R#
- 1...d6
- 2.Sc6#
- 2.Qd7#
- 2.Qc8#
- 2.Qxe7#
- 2.f8Q#
- 2.f8R#
- 1...Rg4+!
- threat
- 1.Qxg7?
- threat
- 2.Qf8#
- 1...d5+
- 2.Rxd5#
- 1...c6
- 2.Bb6#
- 1...c5!
- threat
- 1.Rxg8+?
- Keys
- 1.Rb5!
- threat
- 2.Rb8#
- 1...d5+
- 2.Rxd5#
- 1...c5
- 2.Qb6#
- 1...c6
- 2.Bb6#
- 1...e5
- 2.Qf6#
- 1...e6
- 2.f8Q#
- threat
- 1.Rb5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- P(c);OGATEB::QAB(E)
- P(c);OGATEB::B(A)
- P(d);CHECK,N_PINP(G),OGATEB::R(D),XP(d)
- Tries
- Try
- R(H);CHECK,N_SPINP(G),XB(h)
- Vars
- S(b);XR(H)::P=Q
- Refutation
- R(f);XR(H)
- Try
- Q(E);
- Threat
- QAR1(E)
- Vars
- P(d);CHECK,N_PINP(G),OGATEB::R(D),XP(d)
- P(e);N_PINP(G)::P=Q
- Refutation
- R(f);CHECK
- Try
- Q(E);P_PINP(c)
- Threat
- QAR2(E)
- Vars
- P(d);CHECK,N_PINP(G),OGATEB::R(D),XP(d)
- P(c);N_SPINP(c),OGATE,XQ(E)::B(A),XP(c)
- P(e);N_PINP(G)::P=Q
- Refutation
- R(f);CHECK
- Try
- Q(E);P_PINP(d)
- Threat
- DUALS(2)
- Vars
- R(f);XP(G)::QAR1(E),XP(d)
- B(a);XR(D)::QAR1(E),XP(d)
- P(c);N_SPINP(d),OGATEB,XQ(E)::B(A)
- P(e);N_SPINP(d),OGATE,XQ(E)::R1(D)
- S(b);::QAR1(E),XP(d)
- Refutation
- R(f);CHECK
- Try
- Q(E);N_SPINP(G)
- Threat
- DUALS(4)
- Vars
- R(f);XP(G)::QAR1(E),XP(d)
- P(c);OGATEB::B(A)
- Refutation
- R(f);CHECK
- Try
- Q(E);XR(f)
- Threat
- QAR2(E)
- Vars
- P(d);CHECK,N_PINP(G),OGATEB::R(D),XP(d)
- P(c);OGATEB::B(A)
- Refutation
- P(c);
- Try
- Actual
- R(D);
- Threat
- R(D)
- Vars
- P(d);CHECK,N_PINP(G),OGATEB::R(D),XP(d)
- P(c);OGATEB::QAB(E)
- P(c);OGATEB::B(A)
- P(e);OGATEB::QAB(E)
- P(e);N_PINP(G)::P=Q
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).