MESON Chess Problem Database
Problem Display
PID: 166844 (5RKB/5p2/6Q1/3pr3/Np1kP3/nP3b2/2qP4/1BR1N3 w - - 0 1)
Petite, Efren
Club de Xadrez Sao Paulo, 1955
#2
11 + 8
| 15148 | Sadier Collection | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qd1
- 2.Qg1#
- 2.Qb6#
- 1...Qxb3
- 2.Qb6#
- 1...Qxe4
- 2.Qb6#
- 1...Qxc1
- 2.Sxf3#
- 2.Qg1#
- 1...Qa2
- 2.Sxf3#
- 2.Qg1#
- 2.Qb6#
- 1...Qb2
- 2.Sxf3#
- 2.Qg1#
- 2.Qb6#
- 1...Qxd2
- 2.Qb6#
- 1...Qc4
- 2.Sxf3#
- 2.Qg1#
- 1...Qc5
- 2.Sxf3#
- 2.Qg1#
- 1...Qc6
- 2.Sxf3#
- 2.Qg1#
- 1...Qc7
- 2.Sxf3#
- 2.Qg1#
- 1...Qc8
- 2.Sxf3#
- 2.Qg1#
- 1...Bxe4
- 2.Qg1#
- 1...dxe4
- 2.Rd8#
- 2.Qd6#
- 1...Qd1
- Tries
- 1.Bxc2?
- threat
- 2.Sxf3#
- 2.Qg1#
- 2.Qb6#
- 1...Bxe4
- 2.Qg1#
- 2.Qb6#
- 1...dxe4
- 2.Rd8#
- 2.Qd6#
- 1...fxg6
- 2.Sxf3#
- 1...Bd1
- 2.Qg1#
- 2.Qb6#
- 1...Bh1
- 2.Qg1#
- 2.Qb6#
- 1...Be2
- 2.Qg1#
- 2.Qb6#
- 1...Bg2
- 2.Qb6#
- 1...Bg4
- 2.Qb6#
- 1...Bh5
- 2.Qg1#
- 2.Qb6#
- 1...Sc4
- 2.Sxf3#
- 1...f6
- 2.Sxf3#
- 2.Qg1#
- 1...Sxc2!
- threat
- 1.Qb6+?
- 1...Qc5
- 2.Sxf3#
- 2.Qxc5#
- 1...Kxe4!
- 1...Qc5
- 1.Qd6?
- threat
- 2.Qxe5#
- 2.Qxd5#
- 1...Kxe4
- 2.Qxe5#
- 1...Qxb3
- 2.Bxe5#
- 2.Qc5#
- 2.Qxe5#
- 2.Qb6#
- 1...Qxe4
- 2.Qc5#
- 2.Qb6#
- 1...Qxd2
- 2.Qc5#
- 2.Qb6#
- 1...Bxe4
- 2.Bxe5#
- 2.Qxe5#
- 1...Qc4
- 2.Sxf3#
- 2.Bxe5#
- 2.Qxe5#
- 1...Qc5
- 2.Sxf3#
- 2.Bxe5#
- 2.Qxc5#
- 2.Qxe5#
- 1...Qc6
- 2.Sxf3#
- 2.Bxe5#
- 2.Qxe5#
- 1...Qc7
- 2.Sxf3#
- 2.Bxe5#
- 2.Qxd5#
- 1...Sc4
- 2.Qxd5#
- 1...f6!
- threat
- 1.Qf6?
- threat
- 2.Qxe5#
- 1...Kxe4
- 2.Qxe5#
- 1...Qxe4
- 2.Qb6#
- 1...Qxd2
- 2.Qb6#
- 1...Qc7
- 2.Sxf3#
- 1...Sc4!
- threat
- 1.Bxc2?
- Keys
- 1.Qxf7!
- threat
- 2.Qxd5#
- 1...Kxe4
- 2.Qf4#
- 1...Qxb3
- 2.Qa7#
- 1...Qxe4
- 2.Qa7#
- 1...Qxd2
- 2.Qa7#
- 1...Bxe4
- 2.Qf2#
- 1...dxe4
- 2.Rd8#
- 2.Qd7#
- 1...Qc4
- 2.Sxf3#
- 1...Qc5
- 2.Sxf3#
- 1...Qc6
- 2.Sxf3#
- threat
- 1.Qxf7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- Q(a);N_GUARD,XP(E)::QAB(H)
- Q(a);N_GUARD,XP(G)::QAB(H)
- Q(a);N_GUARD,XP(D)::QAB(H)
- B(c);SBLOCK,XP(G)::QAB(H)
- Tries
- Try
- B(A);XQ(a)
- Threat
- DUALS(3)
- Vars
- P(h);XQ(H)::S(C),XB(c)
- B(c);::QAB(H)
- S(b);::S(C),XB(c)
- Refutation
- S(b);XB(A)
- Try
- Q(H);CHECK
- Refutation
- K(e);N_SPINR(g),P-FLIGHT,P_SPINQ(a),XP(G)
- Try
- Q(H);P_PINP(f)
- Threat
- DUALS(2)
- Vars
- K(e);N_SPINP(f),N_SPINR(g),P-FLIGHT,P_SPINQ(a),XP(G)::QAR1(H),XR(g)
- S(b);::QAR1(H),XP(f)
- Refutation
- P(h);N_SPINR(g)
- Try
- Q(H);
- Threat
- QAB1(H),XR(g)
- Vars
- K(e);N_SPINR(g),P-FLIGHT,P_SPINQ(a),XP(G)::QAR1(H),XR(g)
- Q(a);N_GUARD,XP(G)::QAB(H)
- Q(a);N_GUARD,XP(D)::QAB(H)
- Q(a);::S(C),XB(c)
- Refutation
- S(b);
- Try
- Actual
- Q(H);XP(h)
- Threat
- QAR1(H),XP(f)
- Vars
- K(e);N_SPINR(g),OGATEB,P-FLIGHT,P_SPINQ(a),XP(G)::QAR1(H)
- Q(a);N_GUARD,XP(E)::QAB(H)
- Q(a);N_GUARD,XP(G)::QAB(H)
- Q(a);N_GUARD,XP(D)::QAB(H)
- B(c);OGATE,SBLOCK,XP(G)::QAB(H)
- Q(a);::S(C),XB(c)
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).