MESON Chess Problem Database
Problem Display
PID: 249867 (K1nN3B/2R2p2/1pQN4/1P2n1r1/2pkbRr1/p1p1p3/4P3/7q w - - 0 1)
Wielgos, Oskar
2nd Prize, Deutsche Schachzeitung, 1986
#2
9 + 13
| 6490 | yacpdb | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qa1
- 2.Qxe4#
- 1...Qc1
- 2.Qxe4#
- 1...Qd1
- 2.Qxe4#
- 1...Qe1
- 2.Qxe4#
- 1...Qf1
- 2.Qxe4#
- 1...Qg1
- 2.Qxe4#
- 1...Qh2
- 2.Qxe4#
- 1...Qh3
- 2.Qxe4#
- 1...Qh4
- 2.Qxe4#
- 1...Qh5
- 2.Qxe4#
- 1...Qh6
- 2.Qxe4#
- 1...Qxh8
- 2.Qxe4#
- 1...Rg2
- 2.Rxe4#
- 2.Qxe4#
- 1...Rf5
- 2.Sxf5#
- 1...Rg6
- 2.Sf5#
- 1...Rg7
- 2.Sf5#
- 1...Rg8
- 2.Sf5#
- 1...f5
- 2.Se6#
- 1...f6
- 2.Se6#
- 1...Qa1
- Tries
- 1.S6b7?
- threat
- 2.Qxc4#
- 1...Qxh8
- 2.Qxe4#
- 1...Sd6
- 2.Qxd6#
- 1...f6
- 2.Se6#
- 1...Rg7!
- threat
- 1.S6xf7?
- threat
- 2.Se6#
- 1...Qh6
- 2.Qxe4#
- 1...Rg6
- 2.Bxe5#
- 1...c2!
- threat
- 1.S8b7?
- threat
- 2.Qxc4#
- 1...Qxh8
- 2.Qxe4#
- 1...Sxd6
- 2.Qxd6#
- 1...Rg7
- 2.Sf5#
- 1...f6!
- threat
- 1.Rxe4+?
- 1...Rxe4
- 2.Qxc4#
- 1...Qxe4!
- 1...Rxe4
- 1.Rb7?
- threat
- 2.Qxc4#
- 1...Sxd6
- 2.Qxd6#
- 1...Rg7
- 2.Sf5#
- 1...f6
- 2.Se6#
- 1...Qxh8!
- threat
- 1.Rd7?
- threat
- 2.Sf5#
- 2.Sxc8#
- 1...Qxh8
- 2.Sf5#
- 1...Rxf4
- 2.Sf5#
- 1...Sxd6
- 2.Rxd6#
- 1...Rg7
- 2.Sf5#
- 1...Qh6
- 2.Sf5#
- 1...Rf5
- 2.Sxf5#
- 2.Sxc8#
- 1...Rg6
- 2.Sf5#
- 1...Sa7
- 2.Sxc4#
- 2.Sxe4#
- 2.Sf5#
- 2.S6b7#
- 2.S6xf7#
- 2.Sc8#
- 2.Se8#
- 1...Se7
- 2.Sf5#
- 1...f5
- 2.Sxf5#
- 2.Sxc8#
- 2.Se6#
- 1...f6
- 2.Sf5#
- 2.Se6#
- 1...c2!
- threat
- 1.Qb7?
- threat
- 2.Rxc4#
- 1...Qxh8
- 2.Qxe4#
- 1...Rg7
- 2.Sf5#
- 1...f6
- 2.Se6#
- 1...Sxd6!
- threat
- 1.S6b7?
- Keys
- 1.Kb8!
- threat
- 2.Qxc4#
- 1...Qxh8
- 2.Qxe4#
- 1...Sxd6
- 2.Qxd6#
- 1...Rg7
- 2.Sf5#
- 1...f6
- 2.Se6#
- threat
- 1.Kb8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 15
- Sets
- Q(a);N_GUARD::QAR1(D),XB(g)
- Q(a);N_GUARD,N_SPINS(i),XB(I)::QAR1(D),XB(g)
- R(j);N_GUARD::S(E),XR(j)
- R(j);N_GUARD::S(E)
- R(j);N_GUARD,N_SPINS(i)::S(E)
- P(l);N_GUARD::S(H)
- P(l);N_GUARD,N_SPINS(i)::S(H)
- Tries
- Try
- S(E);N_SPINQ(D)
- Threat
- QAR1(D),XP(e)
- Vars
- Q(a);N_GUARD,N_SPINS(i),XB(I)::QAR1(D),XB(g)
- S(m);N_GUARD::QAR2(D),XS(m)
- P(l);N_GUARD,N_SPINS(i)::S(H)
- Refutation
- R(j);N_SPINS(i)
- Try
- S(E);XP(l)
- Threat
- S(H)
- Vars
- Q(a);N_GUARD::QAR1(D),XB(g)
- R(j);N_GUARD::B(I),XS(i)
- Refutation
- P(c);
- Try
- S(H);N_SPINQ(D)
- Threat
- QAR1(D),XP(e)
- Vars
- Q(a);N_GUARD,N_SPINS(i),XB(I)::QAR1(D),XB(g)
- S(m);OGATE,XS(E)::QAR2(D),XS(m)
- R(j);N_GUARD,N_SPINS(i)::S(E)
- Refutation
- P(l);N_SPINS(i)
- Try
- R(B);CHECK,N_SPINQ(D),XB(g)
- Vars
- R(h);XR(B)::QAR1(D),XP(e)
- Refutation
- Q(a);P_PINQ(D),XR(B)
- Try
- R(F);N_SPINQ(D)
- Threat
- QAR1(D),XP(e)
- Vars
- S(m);OGATE,XS(E)::QAR2(D),XS(m)
- R(j);N_GUARD,N_SPINS(i)::S(E)
- P(l);N_GUARD,N_SPINS(i)::S(H)
- Refutation
- Q(a);N_SPINS(i),XB(I)
- Try
- R(F);
- Threat
- DUALS(2)
- Vars
- Q(a);N_SPINS(i),XB(I)::R(F)+S(E),DCHECK
- R(h);N_SPINB(g),XR(B)::R(F)+S(E),DCHECK
- S(m);OGATE,XS(E)::R(F),XS(m)
- R(j);N_SPINS(i)::R(F)+S(E),DCHECK
- Q(a);::R(F)+S(E),DCHECK
- R(j);::R(F)+S(E),DCHECK
- S(m);::R(F)+S(E),DCHECK
- Refutation
- P(c);
- Try
- Q(D);
- Threat
- R1(F),XP(e)
- Vars
- Q(a);N_GUARD,N_SPINS(i),XB(I)::QAR1(D),XB(g)
- R(j);N_GUARD,N_SPINS(i)::S(E)
- P(l);N_GUARD,N_SPINS(i)::S(H)
- Refutation
- S(m);XS(E)
- Try
- Actual
- K(G);N_SPINQ(D),P-FLIGHT
- Threat
- QAR1(D),XP(e)
- Vars
- Q(a);N_GUARD,N_SPINS(i),XB(I)::QAR1(D),XB(g)
- S(m);OGATE,XS(E)::QAR2(D),XS(m)
- R(j);N_GUARD,N_SPINS(i)::S(E)
- P(l);N_GUARD,N_SPINS(i)::S(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).