MESON Chess Problem Database
Problem Display
PID: 168452 (8/5brN/3pP3/1p5n/r4knR/6NK/3bQPBP/B2q1R2 w - - 0 1)
Petite, Efren
10th Comm., Salazar JT (Problemas), 1986
#2
11 + 10
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qc2
- 2.Qf3#
- 1...Qb1
- 2.Qf3#
- 2.Qxd2#
- 1...Qc1
- 2.Qf3#
- 1...Qe1
- 2.Qf3#
- 1...Qxf1
- 2.Qf3#
- 2.Qxd2#
- 1...Rxa1
- 2.Qe4#
- 1...Ra2
- 2.Qe4#
- 1...Ra3
- 2.Qe4#
- 1...Re4
- 2.Qxe4#
- 1...Ra5
- 2.Qe4#
- 1...Ra6
- 2.Qe4#
- 1...Ra7
- 2.Qe4#
- 1...Ra8
- 2.Qe4#
- 1...Rxh7
- 2.Rxg4#
- 1...Be1
- 2.Qe3#
- 1...Bc3
- 2.Qe3#
- 1...Be3
- 2.Qxe3#
- 2.fxe3#
- 1...Bb4
- 2.Qe3#
- 2.Qe4#
- 1...Ba5
- 2.Qe3#
- 1...Bg6
- 2.Rxg4#
- 1...Sxg3
- 2.fxg3#
- 1...b4
- 2.Qc4#
- 2.Qe4#
- 1...d5
- 2.Be5#
- 2.Qe5#
- 1...Qc2
- Tries
- 1.Bxg7?
- threat
- 2.Bh6#
- 2.Rxg4#
- 1...Bxe6
- 2.Bh6#
- 1...Sxg3
- 2.fxg3#
- 1...Sxg7
- 2.Rxg4#
- 1...Re4
- 2.Rxg4#
- 2.Qxe4#
- 1...Be3
- 2.Rxg4#
- 2.Qxe3#
- 2.fxe3#
- 1...Sf6
- 2.Bh6#
- 1...Qxe2!
- threat
- 1.Rxd1?
- threat
- 2.Qf3#
- 2.Qxd2#
- 1...Rxa1
- 2.Qe4#
- 1...Rxh7
- 2.Rxg4#
- 2.Qxg4#
- 2.Qxd2#
- 1...Sxg3
- 2.Qf3#
- 1...Ra2
- 2.Qf3#
- 2.Qe4#
- 1...Ra3
- 2.Qe4#
- 1...Re4
- 2.Qf3#
- 2.Qxe4#
- 1...Bc1
- 2.Qf3#
- 1...Be1
- 2.Qf3#
- 2.Qe3#
- 1...Bc3
- 2.Qe3#
- 1...Be3
- 2.Qf3#
- 2.Qxe3#
- 2.fxe3#
- 1...Bb4
- 2.Rd4#
- 2.Qf3#
- 2.Qe3#
- 2.Qe4#
- 1...Ba5
- 2.Qf3#
- 2.Qe3#
- 1...Rd4!
- threat
- 1.Qd3?
- threat
- 2.Qf5#
- 2.Qxd6#
- 1...Qxa1
- 2.Qf5#
- 1...Rxh7
- 2.Qf5#
- 1...Bxe6
- 2.Sxh5#
- 2.Qxd6#
- 1...Sxg3
- 2.fxg3#
- 2.hxg3#
- 1...Rd4
- 2.Qf5#
- 2.Qxd4#
- 1...Bc3
- 2.Qf5#
- 2.Qe3#
- 1...Qc2
- 2.Se2#
- 2.Qf3#
- 2.Qxd6#
- 1...Qe2
- 2.Sxe2#
- 2.Qf5#
- 1...Qb1
- 2.Se2#
- 2.Qxd2#
- 2.Qf3#
- 2.Qxd6#
- 1...Qe1
- 2.Qf5#
- 2.Qf3#
- 1...Re4
- 2.Qxe4#
- 1...Ra6
- 2.Qe4#
- 2.Qf5#
- 2.Qd4#
- 1...Bc1
- 2.Qf5#
- 1...Be1
- 2.Qf5#
- 2.Qe3#
- 1...Be3
- 2.Qf5#
- 2.Qxe3#
- 2.fxe3#
- 1...Bb4
- 2.Qe4#
- 2.Qf5#
- 2.Qe3#
- 1...Ba5
- 2.Qf5#
- 2.Qe3#
- 1...Bg6
- 2.Qxd6#
- 1...d5
- 2.Qf5#
- 1...Rg5!
- threat
- 1.Bxg7?
- Keys
- 1.Qxb5!
- threat
- 2.Qf5#
- 1...Bxe6
- 2.Sxh5#
- 1...Sxg3
- 2.hxg3#
- 1...Qc2
- 2.Se2#
- 1...Qb1
- 2.Se2#
- 1...Ra5
- 2.Qc4#
- 1...Rg5
- 2.Qxg5#
- 1...Bg6
- 2.Qg5#
- 1...d5
- 2.Qb8#
- threat
- 1.Qxb5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 4
- REMOVED MATES = 13
- Sets
- Q(a);N_GUARD::QAR1(C)
- R(c);N_GUARD,XB(A)::QAR1(C)
- R(c);N_GUARD::QAR1(C)
- R(c);N_GUARD,P_PINS(G)::QAR1(C)
- R(c);N_GUARD::QAR1(C),XR(c)
- R(j);N_GUARD,XS(K)::R1(I),XS(e)
- B(b);N_GUARD::QAB1(C)
- B(i);S_CUTR(j)::R1(I),XS(e)
- S(g);OGATE,XS(G)::R(B)+P(D)DCHECK,XS(g)
- Tries
- Try
- B(A);XR(j)
- Threat
- DUALS(2)
- Vars
- B(i);XP(J)::B(A)
- S(g);OGATE,XS(G)::R(B)+P(D)DCHECK,XS(g)
- S(g);XB(A)::R1(I),XS(e)
- S(g);::B(A)
- Refutation
- Q(a);XQ(C)
- Try
- R(B);XQ(a)
- Threat
- DUALS(2)
- Vars
- R(c);N_GUARD,XB(A)::QAR1(C)
- S(g);XS(G)::QAR1(C)
- R(c);N_GUARD,P_PINS(G)::QAR1(C)
- B(b);::QAR1(C)
- B(b);N_GUARD::QAB1(C)
- Refutation
- R(c);
- Try
- Q(C);
- Threat
- DUALS(2)
- Vars
- Q(a);XB(A)::QAR1(C)
- R(j);XS(K)::QAR1(C)
- R(c);N_GUARD::QAR1(C),XR(c)
- B(b);::QAR1(C)
- B(i);::QAB(C),XP(h)
- P(h);::QAR1(C)
- Refutation
- R(j);
- Try
- Actual
- Q(C);XP(f)
- Threat
- QAR1(C)
- Vars
- B(i);N_GUARD,XP(J)::S(G),XS(g)
- S(g);OGATE,XS(G)::P(F),XS(g)
- Q(a);N_GUARD::S(G)
- R(c);N_GUARD::QAR(C)
- R(j);N_GUARD::QAB1(C),XR(j)
- B(i);S_CUTR(j)::QAB1(C)
- P(h);OGATEB::QAB(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).