MESON Chess Problem Database
Problem Display
PID: 65825 (4K3/2P2N1p/2rBk1p1/6P1/B1PnbR2/6n1/2N2q2/3R3Q w - - 0 1)
Poisson, Christian
Europe Echecs, 1988
#2
11 + 8
SOLUTION
- SOUND
- Sets
- 1...Qe1
- 2.Sxd4#
- 2.Rf6#
- 1...Qg1
- 2.Rf6#
- 1...Qe3
- 2.Rf6#
- 1...Qf1
- 2.Sxd4#
- 1...Qxc2
- 2.Rf6#
- 1...Qd2
- 2.Rf6#
- 1...Qe2
- 2.Sxd4#
- 2.Rf6#
- 1...Qg2
- 2.Sxd4#
- 2.Rf6#
- 1...Qh2
- 2.Sxd4#
- 2.Rf6#
- 1...Qf3
- 2.Sxd4#
- 1...Qxf4
- 2.Sxd4#
- 1...Rc5
- 2.Bd7#
- 1...Ra6
- 2.Bd7#
- 2.c8Q#
- 2.c8B#
- 1...Rb6
- 2.Bd7#
- 2.c8Q#
- 2.c8B#
- 1...Bxc2
- 2.Qd5#
- 1...Bd3
- 2.Qd5#
- 1...Bf3
- 2.Rf6#
- 1...Bd5
- 2.Qxd5#
- 2.cxd5#
- 1...Bf5
- 2.Qd5#
- 1...Sf1
- 2.Qxe4#
- 1...Sge2
- 2.Qxe4#
- 1...Sgf5
- 2.Rxe4#
- 2.Qxe4#
- 1...Sh5
- 2.Qxe4#
- 1...Sxc2
- 2.Sd8#
- 1...Sde2
- 2.Sd8#
- 1...Sb3
- 2.Sd8#
- 1...Sf3
- 2.Sd8#
- 2.Rf6#
- 1...Sb5
- 2.Sd8#
- 1...Sdf5
- 2.Sd8#
- 1...Qe1
- Tries
- 1.Bxc6?
- threat
- 2.Bd7#
- 2.c8Q#
- 2.c8B#
- 1...Qxc2
- 2.Bd7#
- 2.Rf6#
- 2.c8Q#
- 2.c8B#
- 1...Qxf4
- 2.Sxd4#
- 2.Bd7#
- 2.c8Q#
- 2.c8B#
- 1...Bxh1
- 2.Bd7#
- 2.c8Q#
- 2.c8B#
- 1...Bxc2
- 2.Bd5#
- 2.Bd7#
- 2.Qd5#
- 2.c8Q#
- 2.c8B#
- 1...Sxh1
- 2.Bd7#
- 2.c8Q#
- 2.c8B#
- 1...Sxc2
- 2.Sd8#
- 2.Bd7#
- 2.c8Q#
- 2.c8B#
- 1...Sxc6
- 2.c8Q#
- 2.c8B#
- 1...Qe1
- 2.Sxd4#
- 2.Bd7#
- 2.Rf6#
- 2.c8Q#
- 2.c8B#
- 1...Qg1
- 2.Bd7#
- 2.Rf6#
- 2.c8Q#
- 2.c8B#
- 1...Qe3
- 2.Bd7#
- 2.Rf6#
- 2.c8Q#
- 2.c8B#
- 1...Qf1
- 2.Sxd4#
- 2.Bd7#
- 2.c8Q#
- 2.c8B#
- 1...Qd2
- 2.Bd7#
- 2.Rf6#
- 2.c8Q#
- 2.c8B#
- 1...Qe2
- 2.Sxd4#
- 2.Bd7#
- 2.Rf6#
- 2.c8Q#
- 2.c8B#
- 1...Qg2
- 2.Sxd4#
- 2.Bd7#
- 2.Rf6#
- 2.c8Q#
- 2.c8B#
- 1...Qh2
- 2.Sxd4#
- 2.Bd7#
- 2.Rf6#
- 2.c8Q#
- 2.c8B#
- 1...Qf3
- 2.Sxd4#
- 2.Bd7#
- 2.c8Q#
- 2.c8B#
- 1...Bg2
- 2.Bd7#
- 2.c8Q#
- 2.c8B#
- 1...Bd3
- 2.Bd5#
- 2.Bd7#
- 2.Qd5#
- 2.c8Q#
- 2.c8B#
- 1...Bf3
- 2.Bd7#
- 2.Rf6#
- 2.c8Q#
- 2.c8B#
- 1...Bd5
- 2.Bxd5#
- 2.Bd7#
- 2.Qxd5#
- 2.cxd5#
- 2.c8Q#
- 2.c8B#
- 1...Bf5
- 2.Bd5#
- 2.Bd7#
- 2.Qd5#
- 2.c8Q#
- 2.c8B#
- 1...Sf1
- 2.Bd7#
- 2.Qxe4#
- 2.c8Q#
- 2.c8B#
- 1...Sge2
- 2.Bd7#
- 2.Qxe4#
- 2.c8Q#
- 2.c8B#
- 1...Sgf5
- 2.Bd7#
- 2.Rxe4#
- 2.Qxe4#
- 2.c8Q#
- 2.c8B#
- 1...Sh5
- 2.Bd7#
- 2.Qxe4#
- 2.c8Q#
- 2.c8B#
- 1...Sde2
- 2.Sd8#
- 2.Bd7#
- 2.c8Q#
- 2.c8B#
- 1...Sb3
- 2.Sd8#
- 2.Bd7#
- 2.c8Q#
- 2.c8B#
- 1...Sf3
- 2.Sd8#
- 2.Bd7#
- 2.Rf6#
- 2.c8Q#
- 2.c8B#
- 1...Sb5
- 2.Sd8#
- 2.Bd7#
- 2.c8Q#
- 2.c8B#
- 1...Sdf5
- 2.Sd8#
- 2.Bd7#
- 2.c8Q#
- 2.c8B#
- 1...h5
- 2.Bd7#
- 2.c8Q#
- 2.c8B#
- 1...h6
- 2.Bd7#
- 2.c8Q#
- 2.c8B#
- 1...Bxc6+!
- threat
- 1.Rxd4?
- threat
- 2.Sd8#
- 1...Qxd4
- 2.Sxd4#
- 1...Rxd6
- 2.Rxd6#
- 1...Bd5
- 2.Qxd5#
- 2.cxd5#
- 1...Qxf4!
- threat
- 1.Rxe4+?
- 1...Sxe4
- 2.Qxe4#
- 1...Kf5!
- 1...Sxe4
- 1.Qf3?
- threat
- 2.Rf6#
- 1...Qxf3
- 2.Sxd4#
- 1...Bf5
- 2.Qd5#
- 1...Sgf5
- 2.Rxe4#
- 2.Qxe4#
- 1...Sh5
- 2.Rxe4#
- 2.Qxe4#
- 1...Sdf5
- 2.Sd8#
- 1...Rxc4!
- threat
- 1.Qh3+?
- 1...Sgf5
- 2.Rxe4#
- 1...Sdf5
- 2.Sd8#
- 1...Bf5!
- 1...Sgf5
- 1.Bxc6?
- Keys
- 1.Rf5!
- threat
- 2.Re5#
- 1...Kxf5
- 2.Qh3#
- 1...Qxf5
- 2.Sxd4#
- 1...Bxf5
- 2.Qd5#
- 1...Sgxf5
- 2.Qxe4#
- 1...Sdxf5
- 2.Sd8#
- 1...gxf5
- 2.Qh6#
- 1...Qf4
- 2.Sxd4#
- 1...Rc5
- 2.Bd7#
- 1...Sf3
- 2.Rf6#
- threat
- 1.Rf5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 16
- Sets
- Q(a);N_GUARD::R1(F)
- Q(a);N_GUARD::S(C),XS(c)
- Q(a);N_GUARD,XS(C)::R1(F)
- Q(a);N_GUARD,XR(F)::S(C),XS(c)
- R(e);OGATE::B(D)
- B(d);OGATE,XS(C)::QAB1(B)
- B(d);OGATE::QAB1(B)
- B(d);S_CUTQ(a)::R1(F)
- S(b);N_GUARD::QAR2(B),XB(d)
- S(c);XS(C)::S(J)
- S(c);::S(J)
- Tries
- Try
- B(D);XR(e)
- Threat
- DUALS(3)
- Vars
- S(c);XB(D)::P=Q
- Refutation
- B(d);CHECK,XB(D)
- Try
- R(A);XS(c)
- Threat
- S(J)
- Vars
- Q(a);XR(A)::S(C),XQ(a)
- R(e);OGATE,XB(H)::R1(A),XR(e)
- Refutation
- Q(a);XR(F)
- Try
- R(F);CHECK,XB(d)
- Vars
- S(b);OGATE,XR(F)::QAR2(B),XS(b)
- Refutation
- K(f);S_FLIGHT
- Try
- Q(B);
- Threat
- R1(F)
- Vars
- Q(a);N_GUARD,XQ(B)::S(C),XS(c)
- B(d);OGATE::QAB1(B)
- S(c);::S(J)
- Refutation
- R(e);XP(E)
- Try
- Q(B);CHECK
- Vars
- S(b);P_SPINS(b)::R(F),XB(d)
- S(c);P_SPINS(c)::S(J)
- Refutation
- B(d);P_SPINB(d)
- Try
- Actual
- R(F);
- Threat
- R1(F)
- Vars
- K(f);OGATEB,S_FLIGHT,XR(F)::QAB(B)
- Q(a);N_GUARD,XR(F)::S(C),XS(c)
- B(d);OGATE,XR(F)::QAB1(B)
- S(b);N_GUARD,XR(F)::QAR2(B),XB(d)
- S(c);SBLOCK,XR(F)::S(J)
- P(g);OGATEB,SBLOCK,XR(F)::QAR(B)
- Q(a);N_GUARD::S(C),XS(c)
- R(e);OGATE::B(D)
- S(c);S_CUTQ(a)::R1(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).