MESON Chess Problem Database
Problem Display
PID: 268819 (8/3p1Qpr/8/p2N2R1/1B1kb3/N1n1R3/n3PP2/K3b3 w - - 0 1)
Brabec, Juraj
Gvozdjak, Peter
Labai, Zoltan
Salai (Jr), Ladislav
3/4 Place, 11. WCCT, 2020-2022
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Rh1
- 2.Qxg7#
- 1...Rh2
- 2.Qxg7#
- 1...Rh3
- 2.Qxg7#
- 1...Rh4
- 2.Qxg7#
- 1...Rh5
- 2.Qxg7#
- 1...Rh8
- 2.Qxg7#
- 1...d6
- 2.Qa7#
- 1...g6
- 2.Qf6#
- 1...Rh1
- Tries
- 1.Sc2+?
- 1...Kc4
- 2.Sb6#
- 1...Bxc2!
- 1...Kc4
- 1.Sxc3?
- threat
- 2.Sab5#
- 2.Scb5#
- 2.Bc5#
- 2.Rxe4#
- 2.Qc4#
- 1...Bxf2
- 2.Bc5#
- 2.Rxe4#
- 1...Sxc3
- 2.Bc5#
- 2.Qc4#
- 1...Sxb4
- 2.Sab5#
- 2.Scb5#
- 2.Qc4#
- 1...axb4
- 2.Sab5#
- 2.Scb5#
- 2.Qc4#
- 1...Rh4
- 2.Sab5#
- 2.Scb5#
- 2.Bc5#
- 2.Qc4#
- 2.Qxg7#
- 1...Bb1
- 2.Sab5#
- 2.Scb5#
- 2.Bc5#
- 2.Rd5#
- 2.Qc4#
- 2.Qd5#
- 2.Qxd7#
- 1...Bh1
- 2.Sc2#
- 2.Sab5#
- 2.Scb5#
- 2.Bc5#
- 2.Rd3#
- 2.Qc4#
- 1...Bc2
- 2.Sxc2#
- 2.Sab5#
- 2.Scb5#
- 2.Bc5#
- 2.Rd5#
- 2.Qc4#
- 2.Qd5#
- 2.Qxd7#
- 1...Bg2
- 2.Sc2#
- 2.Sab5#
- 2.Scb5#
- 2.Bc5#
- 2.Rd3#
- 2.Qc4#
- 1...Bd3
- 2.Rxd3#
- 2.Rd5#
- 2.Qd5#
- 2.Qxd7#
- 1...Bf3
- 2.Sc2#
- 2.Sab5#
- 2.Scb5#
- 2.Bc5#
- 2.Rd3#
- 2.Qc4#
- 1...Bd5
- 2.Scb5#
- 2.Rd3#
- 2.Rxd5#
- 2.Qxd5#
- 1...Bf5
- 2.Sab5#
- 2.Scb5#
- 2.Qc4#
- 2.Qd5#
- 1...Bc6
- 2.Sc2#
- 2.Bc5#
- 2.Rd3#
- 2.Qc4#
- 1...Bg6
- 2.Sab5#
- 2.Scb5#
- 2.Bc5#
- 2.Rd5#
- 2.Qc4#
- 2.Qd5#
- 2.Qxd7#
- 1...Bb7
- 2.Sc2#
- 2.Sab5#
- 2.Scb5#
- 2.Bc5#
- 2.Rd3#
- 2.Qc4#
- 1...Ba8
- 2.Sc2#
- 2.Sab5#
- 2.Scb5#
- 2.Bc5#
- 2.Rd3#
- 2.Qc4#
- 1...d5
- 2.Scb5#
- 2.Qa7#
- 1...d6
- 2.Sab5#
- 2.Scb5#
- 2.Rxe4#
- 2.Qc4#
- 2.Qa7#
- 1...Bxc3+!
- threat
- 1.Sb6?
- threat
- 2.Bc5#
- 2.Qc4#
- 1...Bxf2
- 2.Bc5#
- 1...Sxb4
- 2.Qc4#
- 1...axb4
- 2.Qc4#
- 1...Bd3
- 2.Bc5#
- 1...Bd5
- 2.Sc2#
- 1...Bf5
- 2.Qc4#
- 1...Sa4
- 2.Sb5#
- 2.Qc4#
- 1...Sd5
- 2.Sb5#
- 1...d6
- 2.Qc4#
- 1...d5!
- threat
- 1.Sc7?
- threat
- 2.Bc5#
- 2.Qc4#
- 1...Bxf2
- 2.Bc5#
- 1...Sxb4
- 2.Qc4#
- 1...axb4
- 2.Qc4#
- 1...Bd3
- 2.Bc5#
- 1...Bf5
- 2.Qc4#
- 1...Sa4
- 2.Sab5#
- 2.Scb5#
- 2.Qc4#
- 1...Sd5
- 2.Scb5#
- 1...d5
- 2.Se6#
- 1...d6
- 2.Se6#
- 2.Qc4#
- 1...Bd5!
- threat
- 1.Se7?
- threat
- 2.Bc5#
- 2.Qc4#
- 1...Bxf2
- 2.Bc5#
- 1...Sxb4
- 2.Qc4#
- 1...axb4
- 2.Qc4#
- 1...Bd5
- 2.Sf5#
- 1...Bd3
- 2.Bc5#
- 1...Bf5
- 2.Sxf5#
- 2.Qc4#
- 1...Sa4
- 2.Sb5#
- 2.Qc4#
- 1...d5
- 2.Sc6#
- 1...d6
- 2.Qc4#
- 1...Sd5!
- threat
- 1.Rxe4+?
- 1...Kxe4
- 2.Qf4#
- 1...Sxe4!
- 1...Kxe4
- 1.Sc2+?
- Keys
- 1.Sf6!
- threat
- 2.Bc5#
- 2.Qc4#
- 1...Bxf2
- 2.Bc5#
- 1...Sxb4
- 2.Qc4#
- 1...axb4
- 2.Qc4#
- 1...Bd3
- 2.Bc5#
- 2.Rxd3#
- 1...Bd5
- 2.Rd3#
- 1...Bf5
- 2.Qc4#
- 1...Sa4
- 2.Sb5#
- 2.Rxe4#
- 2.Qc4#
- 1...Sd5
- 2.Rxe4#
- 1...d5
- 2.Qa7#
- 1...d6
- 2.Qc4#
- 2.Qa7#
- threat
- 1.Sf6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 8
- Sets
- R(i);N_GUARD::QAB(I),XP(h)
- P(g);OGATE::QAB(I)
- P(h);N_GUARD::QAB(I)
- Tries
- Try
- S(D);CHECK
- Vars
- K(d);P-FLIGHT::QAB(I)+S(G),DCHECK
- Refutation
- B(e);XS(D)
- Try
- S(G);XS(c)
- Threat
- DUALS(5)
- Refutation
- B(a);CHECK,XS(G)
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- B(a);XP(C)::B(F)
- S(b);XB(F)::QAR1(I)
- P(f);XB(F)::QAR1(I)
- B(e);::B(F)
- B(e);N_GUARD::S(D)
- B(e);::QAR1(I)
- S(c);N_GUARD::S(D)
- P(g);::QAR1(I)
- Refutation
- P(g);
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- B(a);XP(C)::B(F)
- S(b);XB(F)::QAR1(I)
- P(f);XB(F)::QAR1(I)
- B(e);::B(F)
- B(e);::QAR1(I)
- S(c);N_GUARD::S(G)
- P(g);N_GUARD::S(G)
- Refutation
- B(e);
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- B(a);XP(C)::B(F)
- S(b);XB(F)::QAR1(I)
- P(f);XB(F)::QAR1(I)
- B(e);N_GUARD::S(G)
- B(e);::B(F)
- P(g);N_GUARD,S_CUTB(e)::S(G)
- P(g);::QAR1(I)
- Refutation
- S(c);
- Try
- R(E);CHECK,XB(e)
- Vars
- K(d);P-FLIGHT,S_CUTS(c),XR(E)::QAR1(I)
- Refutation
- S(c);XR(E)
- Try
- Actual
- S(G);
- Threat
- DUALS(2)
- Vars
- B(a);XP(C)::B(F)
- S(b);XB(F)::QAR1(I)
- P(f);XB(F)::QAR1(I)
- B(e);N_GUARD::R1(E)
- B(e);::QAR1(I)
- S(c);N_GUARD::R1(E),XB(e)
- P(g);OGATE::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).