MESON Chess Problem Database
Problem Display
PID: 84868 (4kNK1/RP1p1N2/5P2/2p1B3/2p1B1P1/1r6/q3Q3/8 w - - 0 1)
Petite, Efren
Probleemblad, 1962
#2
10 + 6
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Ra8#
- 1...Qb2
- 2.Ra8#
- 1...Qc2
- 2.Ra8#
- 1...Qd2
- 2.Ra8#
- 1...Qxe2
- 2.Ra8#
- 1...Ra3
- 2.b8Q#
- 2.b8R#
- 1...Rc3
- 2.b8Q#
- 2.b8R#
- 1...Rd3
- 2.b8Q#
- 2.b8R#
- 1...Re3
- 2.b8Q#
- 2.b8R#
- 1...Rf3
- 2.b8Q#
- 2.b8R#
- 1...Rg3
- 2.b8Q#
- 2.b8R#
- 1...Rh3
- 2.b8Q#
- 2.b8R#
- 1...d6
- 2.Bc6#
- 1...Qb1
- Tries
- 1.Se6?
- threat
- 2.Sc7#
- 2.Sg7#
- 2.Sd6#
- 1...Rxb7
- 2.Sg7#
- 2.Sd6#
- 1...dxe6
- 2.Bc6#
- 1...d6
- 2.Bc6#
- 1...Qd2
- 2.Sc7#
- 2.Sg7#
- 2.Ra8#
- 1...Qa5
- 2.Sg7#
- 2.Sd6#
- 1...Qa6
- 2.Sc7#
- 2.Sg7#
- 1...Rd3
- 2.Sc7#
- 2.Sg7#
- 2.b8Q#
- 2.b8R#
- 1...Rb6
- 2.Sc7#
- 2.Sg7#
- 1...d5!
- threat
- 1.Bc2?
- threat
- 2.Bc3#
- 1...Qxc2
- 2.Ra8#
- 1...Rc3
- 2.Bxc3#
- 2.b8Q#
- 2.b8R#
- 1...Rd3
- 2.b8Q#
- 2.b8R#
- 1...Re3
- 2.b8Q#
- 2.b8R#
- 1...Rf3
- 2.b8Q#
- 2.b8R#
- 1...Rg3
- 2.Bxg3#
- 2.b8Q#
- 2.b8R#
- 1...Rh3
- 2.Bg3#
- 2.b8Q#
- 2.b8R#
- 1...Rb6
- 2.Bd6#
- 1...c3
- 2.Bh2#
- 2.Bxc3#
- 2.Bg3#
- 2.Bd4#
- 2.Bf4#
- 2.Bd6#
- 2.Bc7#
- 2.Bb8#
- 1...Qa6!
- threat
- 1.Bc6?
- threat
- 2.Bxd7#
- 1...Rxb7
- 2.Bb2#
- 1...Qd2
- 2.Ra8#
- 1...Qa4
- 2.Bc3#
- 1...Rd3
- 2.b8Q#
- 2.b8R#
- 1...dxc6!
- threat
- 1.Bb2?
- threat
- 2.Bd3#
- 1...Qxb2
- 2.Ra8#
- 1...Rxb2
- 2.Bc2#
- 1...Rd3
- 2.Bxd3#
- 2.b8Q#
- 2.b8R#
- 1...Re3
- 2.b8Q#
- 2.b8R#
- 1...Rf3
- 2.Bxf3#
- 2.b8Q#
- 2.b8R#
- 1...Rg3
- 2.Bf3#
- 2.b8Q#
- 2.b8R#
- 1...Rh3
- 2.Bf3#
- 2.b8Q#
- 2.b8R#
- 1...Rb6
- 2.Bc6#
- 1...Qa6!
- threat
- 1.Bc3?
- threat
- 2.Bc2#
- 1...Qxe2
- 2.Ra8#
- 1...Rxc3
- 2.b8Q#
- 2.b8R#
- 1...Qa6
- 2.Bc6#
- 1...Qc2
- 2.Bxc2#
- 2.Ra8#
- 1...Qd2
- 2.Ra8#
- 1...Rb6!
- threat
- 1.Bd6?
- 1...Qxe2
- 2.Ra8#
- 1...Qxa7
- 2.Bd3#
- 1...Rxb7
- 2.Bc2#
- 1...Qa6
- 2.Bd3#
- 1...Qb1
- 2.Bd3#
- 2.Ra8#
- 1...Qb2
- 2.Ra8#
- 1...Qc2
- 2.Ra8#
- 1...Qd2
- 2.Ra8#
- 1...Qa3
- 2.Bd3#
- 1...Qa4
- 2.Bd3#
- 1...Qa5
- 2.Bd3#
- 1...Rb1
- 2.Bc2#
- 1...Rb2
- 2.Bc2#
- 1...Ra3
- 2.b8Q#
- 2.b8R#
- 1...Rc3
- 2.b8Q#
- 2.b8R#
- 1...Rd3
- 2.b8Q#
- 2.b8R#
- 1...Re3
- 2.b8Q#
- 2.b8R#
- 1...Rf3
- 2.b8Q#
- 2.b8R#
- 1...Rg3
- 2.b8Q#
- 2.b8R#
- 1...Rh3
- 2.b8Q#
- 2.b8R#
- 1...Rb4
- 2.Bc2#
- 1...Rb5
- 2.Bc2#
- 1...Rb6
- 2.Bc2#
- 1...c3
- 2.Bc2#
- 1...Qa1!
- 1...Qxe2
- 1.Rxa2?
- threat
- 2.Ra8#
- 1...Ra3
- 2.b8Q#
- 2.b8R#
- 1...Rxb7!
- threat
- 1.Qxa2?
- threat
- 2.Ra8#
- 1...Ra3
- 2.b8Q#
- 2.b8R#
- 1...Rxb7!
- threat
- 1.Se6?
- Keys
- 1.Bf5!
- threat
- 2.Bxd7#
- 1...Rxb7
- 2.Bb2#
- 1...Qd2
- 2.Ra8#
- 1...Qa4
- 2.Bc3#
- 1...Rd3
- 2.b8Q#
- 2.b8R#
- 1...d5
- 2.Bd7#
- 1...d6
- 2.Bd7#
- threat
- 1.Bf5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 4
- Sets
- Q(a);N_GUARD::R(F)
- Q(a);N_GUARD,XQ(A)::R(F)
- R(b);N_GUARD::P=Q
- R(b);N_GUARD,P_PINP(C)::P=Q
- P(e);OGATEB::B(B)
- Tries
- Try
- S(I);
- Threat
- DUALS(3)
- Vars
- P(e);OGATEB,XS(I)::B(B)
- P(e);OGATEB::B(B)
- Refutation
- P(e);
- Try
- B(B);
- Threat
- QAR(A)+B(D)
- Vars
- Q(a);N_GUARD,XB(B)::R(F)
- R(b);N_GUARD::P=Q
- R(b);N_GUARD::QAR(A)+B(D)
- Refutation
- Q(a);
- Try
- B(B);P_PINP(e)
- Threat
- B(B),XP(e)
- Vars
- R(b);N_GUARD,XP(G)::QAR(A)+B(D)
- Q(a);N_GUARD::R(F)
- Q(a);N_GUARD::QAR(A)+B(D)
- R(b);N_GUARD::P=Q
- Refutation
- P(e);N_SPINP(e),XB(B)
- Try
- B(D);
- Threat
- QAR(A)+B(B)
- Vars
- Q(a);N_GUARD,XB(D)::R(F)
- R(b);N_GUARD,XB(D)::QAR(A)+B(B)
- R(b);N_GUARD::P=Q
- R(b);N_GUARD::QAR(A)+B(B)
- Refutation
- Q(a);
- Try
- B(D);
- Threat
- QAR(A)+B(B)
- Vars
- Q(a);N_GUARD,XQ(A)::R(F)
- R(b);N_GUARD,XB(D)::P=Q
- Q(a);N_GUARD::QAR(A)+B(B)
- Q(a);N_GUARD::R(F)
- Refutation
- R(b);
- Try
- B(D);
- Vars
- Q(a);N_GUARD,XQ(A)::R(F)
- Q(a);N_GUARD,XR(F)::QAR(A)+B(B)
- R(b);N_GUARD,XP(G)::QAR(A)+B(B)
- Q(a);N_GUARD::QAR(A)+B(B)
- Q(a);N_GUARD::R(F)
- R(b);N_GUARD::QAR(A)+B(B)
- R(b);N_GUARD::P=Q
- R(b);N_GUARD,P_PINP(C)::P=Q
- P(c);S_CUTR(b)::QAR(A)+B(B)
- Refutation
- Q(a);
- Try
- R(F);XQ(a)
- Threat
- R(F)
- Vars
- R(b);N_GUARD::P=Q
- Refutation
- R(b);XP(G)
- Try
- Q(A);XQ(a)
- Threat
- R(F)
- Vars
- R(b);N_GUARD::P=Q
- Refutation
- R(b);XP(G)
- Try
- Actual
- B(B);
- Threat
- B(B),XP(e)
- Vars
- R(b);N_GUARD,XP(G)::QAR(A)+B(D)
- Q(a);N_GUARD::R(F)
- Q(a);N_GUARD::QAR(A)+B(D)
- R(b);N_GUARD::P=Q
- P(e);::B(B)
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).