MESON Chess Problem Database
Problem Display
PID: 262488 (1b6/2N2Np1/B1Q1p3/3q1p2/RK2kp2/R6p/2P2B2/6n1 w - - 0 1)
Doukhan, Gerard
Europe Echecs, 1976
#2
9 + 9
| 6490 | yacpdb | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Sf3
- 2.Bd3#
- 1...f3
- 2.Kc3#
- 1...e5
- 2.Sg5#
- 2.Sd6#
- 2.Qxd5#
- 1...Sf3
- Tries
- 1.Sxd5?
- threat
- 2.Ka5#
- 2.Kb5#
- 2.Kc5#
- 2.Sc3#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 2.Se7#
- 2.Qc4#
- 1...exd5
- 2.Ka5#
- 2.Kb5#
- 2.Kc5#
- 1...Be5
- 2.Sc3#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 2.Se7#
- 2.Sg5#
- 1...Ba7
- 2.Sc3#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 2.Se7#
- 2.Qxe6#
- 1...Bc7
- 2.Kb5#
- 2.Kc5#
- 2.Sc3#
- 2.Sb6#
- 2.Sf6#
- 2.Sxc7#
- 2.Se7#
- 2.Qc4#
- 1...Se2
- 2.Sc3#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 2.Se7#
- 1...Sf3
- 2.Sc3#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 2.Se7#
- 2.Bd3#
- 1...f3
- 2.Kb3#
- 2.Kc3#
- 2.Ka5#
- 2.Kb5#
- 2.Kc5#
- 2.Bd3#
- 2.Qc4#
- 1...Bd6+!
- threat
- 1.Bb7?
- threat
- 2.Qc4#
- 2.Qxe6#
- 1...Qxc6
- 2.Ka5#
- 2.Bxc6#
- 1...Bxc7
- 2.Qc4#
- 1...f3
- 2.Kc3#
- 2.Qc4#
- 1...Ba7
- 2.Qxe6#
- 1...Se2
- 2.Qxe6#
- 1...e5
- 2.Sg5#
- 2.Sd6#
- 2.Qxd5#
- 2.Qc4#
- 1...Sf3!
- threat
- 1.Re3+?
- 1...Kd4
- 2.Re1#
- 2.Re2#
- 2.Re5#
- 2.Rxe6#
- 2.Qc3#
- 2.c3#
- 1...fxe3!
- 1...Kd4
- 1.Rg3?
- threat
- 2.Ka3#
- 2.Kc3#
- 2.Bd3#
- 1...Qxc6
- 2.Bd3#
- 1...f3
- 2.Ka3#
- 2.Kc3#
- 1...Ba7
- 2.Bd3#
- 1...Se2
- 2.Bd3#
- 1...Sf3
- 2.Bd3#
- 1...fxg3!
- threat
- 1.Rxh3?
- threat
- 2.Ka3#
- 2.Kc3#
- 2.Bd3#
- 1...Qxc6
- 2.Bd3#
- 1...f3
- 2.Ka3#
- 2.Kc3#
- 1...Ba7
- 2.Bd3#
- 1...Se2
- 2.Bd3#
- 1...Sf3
- 2.Bd3#
- 1...Sxh3!
- threat
- 1.Qc4+?
- 1...Qd4
- 2.Bb7#
- 2.Qxd4#
- 1...Qxc4+!
- 1...Qd4
- 1.Qxe6+?
- 1...Qe5
- 2.Sg5#
- 2.Sd6#
- 2.Bb7#
- 2.Qxe5#
- 1...Qxe6!
- 1...Qe5
- 1.Sxd5?
- Keys
- 1.Qc3!
- threat
- 2.Sg5#
- 1...Qb3+
- 2.Kxb3#
- 1...Qc4+
- 2.Qxc4#
- 1...Qb7+
- 2.Bxb7#
- 1...Qd4+
- 2.Qxd4#
- 1...Qa5+
- 2.Kxa5#
- 1...Qb5+
- 2.Kxb5#
- 1...Qc5+
- 2.Kxc5#
- 1...Qd6+
- 2.Sxd6#
- 1...f3
- 2.Qe3#
- 1...Qd8
- 2.Qe5#
- 1...Sf3
- 2.Qxf3#
- 1...g5
- 2.Sxg5#
- threat
- 1.Qc3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 10
- REMOVED MATES = 0
- Sets
- S(a);SBLOCK::B(F)
- P(d);SBLOCK::R(D)+K(E)
- Tries
- Try
- S(H);XQ(e)
- Threat
- DUALS(9)
- Refutation
- B(i);CHECK
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- B(i);XS(H)::QAR2(G)
- B(i);::QAR2(G),XP(g)
- S(a);::QAR2(G),XP(g)
- Refutation
- S(a);
- Try
- R(C);CHECK
- Refutation
- P(d);XR(C)
- Try
- R(C);
- Threat
- DUALS(3)
- Vars
- Q(e);N_SPINQ(e),XQ(G)::B(F)
- B(i);::B(F)
- S(a);::B(F)
- Refutation
- P(d);XR(C)
- Try
- R(C);XP(b)
- Threat
- DUALS(3)
- Vars
- Q(e);N_SPINQ(e),XQ(G)::B(F)
- B(i);::B(F)
- S(a);::B(F)
- Refutation
- S(a);XR(C)
- Try
- Q(G);CHECK,N_PINQ(e)
- Refutation
- Q(e);CHECK,XQ(G)
- Try
- Q(G);CHECK,N_PINQ(e),XP(g)
- Refutation
- Q(e);XQ(G)
- Try
- Actual
- Q(G);N_PINQ(e)
- Threat
- S(I)
- Vars
- Q(e);CHECK::R(D)+K(E),XQ(e)
- Q(e);CHECK,N_GUARD::QAR2(G),XQ(e)
- Q(e);CHECK,OGATEB::B(F),XQ(e)
- Q(e);CHECK,N_GUARD::QAR1(G),XQ(e)
- Q(e);CHECK,N_GUARD::S(I),XQ(e)
- P(d);N_GUARD::QAR1(G)
- Q(e);N_GUARD::QAR1(G)
- S(a);N_GUARD::QAB1(G),XS(a)
- P(h);::S(I),XP(h)
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).