MESON Chess Problem Database
Problem Display
PID: 84797 (b6K/r2p4/1N1N1p2/2P1kP1Q/R2n1p2/8/B7/8 w - - 0 1)
Petite, Efren
Magyar Sakkelet, 1990
#2
8 + 7
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rxa4
- 2.Sxd7#
- 1...Ra5
- 2.Sxd7#
- 1...Ra6
- 2.Sxd7#
- 1...Be4
- 2.Sdc4#
- 2.Sf7#
- 1...Bb7
- 2.Sxd7#
- 1...Sc2
- 2.Sf7#
- 2.Qe8#
- 1...Se2
- 2.Sf7#
- 2.Qe8#
- 1...Sb3
- 2.Sf7#
- 2.Qe8#
- 1...Sf3
- 2.Sf7#
- 2.Qe8#
- 1...Sb5
- 2.Sf7#
- 2.Qe8#
- 1...Sxf5
- 2.Sf7#
- 2.Qxf5#
- 1...Sc6
- 2.Sf7#
- 2.Re4#
- 2.Qe2#
- 1...Se6
- 2.Sf7#
- 1...f3
- 2.Qh2#
- 1...Rxa4
- Tries
- 1.Bb1?
- threat
- 2.Sdc4#
- 2.Sf7#
- 1...Rxa4
- 2.Sf7#
- 1...Sxf5
- 2.Qxf5#
- 1...f3
- 2.Qh2#
- 1...Sc2
- 2.Sf7#
- 2.Qe8#
- 1...Se2
- 2.Sf7#
- 2.Qe8#
- 1...Sb3
- 2.Sf7#
- 2.Qe8#
- 1...Sf3
- 2.Sf7#
- 2.Qe8#
- 1...Sb5
- 2.Sf7#
- 2.Qe8#
- 1...Sc6
- 2.Sf7#
- 2.Re4#
- 2.Qe2#
- 1...Se6
- 2.Sf7#
- 1...Bd5!
- threat
- 1.Bd5?
- threat
- 2.Sdc4#
- 2.Sf7#
- 1...Rxa4
- 2.Sf7#
- 1...Sxf5
- 2.Sf7#
- 2.Re4#
- 2.Qxf5#
- 1...f3
- 2.Qh2#
- 1...Sc2
- 2.Sf7#
- 2.Re4#
- 2.Qe8#
- 1...Se2
- 2.Sf7#
- 2.Re4#
- 2.Qxe2#
- 2.Qe8#
- 1...Sb3
- 2.Sf7#
- 2.Re4#
- 2.Qe2#
- 2.Qe8#
- 1...Sf3
- 2.Sf7#
- 2.Re4#
- 2.Qe8#
- 1...Sb5
- 2.Sf7#
- 2.Re4#
- 2.Qe2#
- 2.Qe8#
- 1...Sc6
- 2.Sf7#
- 2.Re4#
- 2.Qe2#
- 1...Se6
- 2.Sf7#
- 2.Re4#
- 2.Qe2#
- 1...Bxd5!
- threat
- 1.Bg8?
- threat
- 2.Sbc4#
- 1...Rxa4
- 2.Sxd7#
- 1...Sxf5
- 2.Qxf5#
- 1...f3
- 2.Qh2#
- 1...Sc2
- 2.Sf7#
- 2.Qe8#
- 1...Se2
- 2.Sf7#
- 2.Qe8#
- 1...Sb3
- 2.Sf7#
- 2.Qe8#
- 1...Sf3
- 2.Sf7#
- 2.Qe8#
- 1...Sb5
- 2.Sf7#
- 2.Qe8#
- 1...Sc6
- 2.Sf7#
- 2.Re4#
- 2.Qe2#
- 1...Se6
- 2.Sf7#
- 1...Bd5!
- threat
- 1.Qe2+?
- 1...Be4
- 2.Qxe4#
- 1...Sxe2!
- 1...Be4
- 1.Bb1?
- Keys
- 1.Qd1!
- threat
- 2.Qxd4#
- 1...Rxa4
- 2.Sxd7#
- 1...Sxf5
- 2.Sf7#
- 1...Sc2
- 2.Sbc4#
- 1...Se2
- 2.Sbc4#
- 1...Sb3
- 2.Sbc4#
- 1...Sf3
- 2.Sbc4#
- 1...Sb5
- 2.Sbc4#
- 1...Sc6
- 2.Sbc4#
- 2.Re4#
- 2.Qe2#
- 2.Qe1#
- 2.Qd5#
- 1...Se6
- 2.Sbc4#
- threat
- 1.Qd1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 6
- REMOVED MATES = 4
- Sets
- R(e);N_GUARD,XR(B)::S(F),XP(f)
- R(e);N_GUARD::S(F),XP(f)
- B(g);S_CUTR(e)::S(F),XP(f)
- S(a);::S(G)
- P(b);OGATEB::QAB(E)
- Tries
- Try
- B(A);
- Threat
- DUALS(2)
- Vars
- R(e);XR(B)::S(G)
- S(a);OGATE,P_SPINS(a),XP(D)::QAR1(E),XS(a)
- P(b);OGATEB::QAB(E)
- S(a);::S(G)
- Refutation
- B(g);
- Try
- B(A);
- Threat
- DUALS(2)
- Vars
- R(e);XR(B)::S(G)
- P(b);OGATEB::QAB(E)
- Refutation
- B(g);XB(A)
- Try
- B(A);
- Threat
- S(F)
- Vars
- R(e);N_GUARD,XR(B)::S(F),XP(f)
- S(a);OGATE,P_SPINS(a),XP(D)::QAR1(E),XS(a)
- P(b);OGATEB::QAB(E)
- S(a);::S(G)
- Refutation
- B(g);
- Try
- Q(E);CHECK
- Vars
- B(g);N_GUARD,P_SPINB(g)::QAR1(E),XB(g)
- Refutation
- S(a);XQ(E)
- Try
- Actual
- Q(E);
- Threat
- QAB1(E),XS(a)
- Vars
- R(e);N_GUARD,XR(B)::S(F),XP(f)
- S(a);SBLOCK,XP(D)::S(G)
- S(a);::S(F)
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).