MESON Chess Problem Database
Problem Display
PID: 71211 (8/3Rp3/QB1n4/r1r1N1Kb/1pBkP1N1/4pP2/3Pq3/2R5 w - - 0 1)
Michel, Francois
Monreal, Pierre
La Cle, 1970
#2
11 + 9
SOLUTION
- SOUND
- Sets
- 1...Qd1
- 2.dxe3#
- 1...Qf1
- 2.dxe3#
- 1...Qxc4
- 2.Rxc4#
- 2.Qxc4#
- 2.dxe3#
- 1...Qg2
- 2.dxe3#
- 1...Qh2
- 2.dxe3#
- 1...Ra1
- 2.Qxa1#
- 1...Rb5
- 2.Qa1#
- 1...e6
- 2.Rxd6#
- 1...Qd1
- Tries
- 1.Kf4?
- threat
- 2.Sc6#
- 1...Qxf3+
- 2.Sxf3#
- 1...Qxc4
- 2.Rxc4#
- 2.Qxc4#
- 2.dxe3#
- 1...Qh2+!
- threat
- 1.Kh6?
- threat
- 2.Sc6#
- 1...Qxc4
- 2.Rxc4#
- 2.Qxc4#
- 2.dxe3#
- 1...Qxf3!
- threat
- 1.Bxe2?
- threat
- 2.Rc4#
- 2.Qd3#
- 2.Qc4#
- 2.dxe3#
- 1...Rxa6
- 2.Bxc5#
- 2.Rc4#
- 2.dxe3#
- 1...exd2
- 2.Rc4#
- 2.Qd3#
- 2.Qc4#
- 1...Ra3
- 2.Bxc5#
- 2.Rc4#
- 2.Qc4#
- 1...Rb5
- 2.Rc4#
- 2.Qa1#
- 2.dxe3#
- 1...Bf7
- 2.Qd3#
- 2.dxe3#
- 1...Bxg4!
- threat
- 1.Bb5?
- threat
- 2.Bxc5#
- 1...Qxf3
- 2.Rc4#
- 1...Qxb5
- 2.dxe3#
- 1...Rxb5
- 2.Qa1#
- 1...Qc4
- 2.Rxc4#
- 2.dxe3#
- 1...Bxg4!
- threat
- 1.Bxc5+?
- 1...Rxc5
- 2.Qa1#
- 1...Kxc5!
- 1...Rxc5
- 1.Qb7?
- threat
- 2.Qd5#
- 1...Qxc4
- 2.Rxc4#
- 2.dxe3#
- 1...e6
- 2.Rxd6#
- 1...Bf7!
- threat
- 1.Qxa5?
- threat
- 2.Bxc5#
- 2.Qa1#
- 2.Qxc5#
- 1...Qxc4
- 2.Rxc4#
- 2.dxe3#
- 1...Qxd2
- 2.Bxc5#
- 2.Qxc5#
- 1...Bxg4
- 2.Qa1#
- 2.Qxc5#
- 1...Qd3
- 2.Bxc5#
- 2.Qxc5#
- 1...b3
- 2.Bxc5#
- 2.Qc3#
- 2.Qxc5#
- 1...Qxf3!
- threat
- 1.Kf4?
- Keys
- 1.Bd5!
- threat
- 2.Sc6#
- 1...Sxe4+
- 2.Bxe4#
- 1...Sf7+
- 2.Bxf7#
- 1...Qxa6
- 2.dxe3#
- 1...Rxa6
- 2.Bxc5#
- 1...Qc4
- 2.dxe3#
- 1...Qb5
- 2.dxe3#
- 1...Rb5
- 2.Qa1#
- 1...Sc4
- 2.Bxc4#
- 1...Sb5
- 2.Bxc5#
- threat
- 1.Bd5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 8
- REMOVED MATES = 6
- Sets
- Q(a);N_GUARD::P(B),XP(b)
- Q(a);N_GUARD,N_PINS(G),P_PINS(F)::P(B),XP(b)
- R(e);OGATE::QAB(I),XR(e)
- R(e);OGATE::QAB(I)
- P(i);N_GUARD::R(K),XS(h)
- Tries
- Try
- K(H);N_SPINS(G),S_FLIGHT
- Threat
- S(G)
- Vars
- Q(a);CHECK,XP(C)::S(G),XQ(a)
- Refutation
- Q(a);CHECK
- Try
- K(H);N_SPINS(G),S_FLIGHT
- Threat
- S(G)
- Refutation
- Q(a);XP(C)
- Try
- B(D);XQ(a)
- Threat
- DUALS(4)
- Refutation
- B(g);XS(F)
- Try
- B(D);
- Threat
- B(J),XR(f)
- Vars
- Q(a);N_GUARD,XP(C)::R1(A)
- Q(a);N_GUARD,XB(D)::P(B),XP(b)
- R(e);OGATE,XB(D)::QAB(I)
- Refutation
- B(g);XS(F)
- Try
- B(J);CHECK,N_SPINS(G),XR(f)
- Vars
- R(e);OGATE,P_PINS(G),SBLOCK,XB(J)::QAB(I)
- Refutation
- K(d);N_SPINS(h),S_FLIGHT,XB(J)
- Try
- Q(I);
- Threat
- QAR1(I)
- Vars
- P(i);N_GUARD::R(K),XS(h)
- Refutation
- B(g);
- Try
- Q(I);XR(e)
- Threat
- DUALS(3)
- Refutation
- Q(a);XP(C)
- Try
- Actual
- B(D);N_PINS(h),N_SPINS(G)
- Threat
- S(G)
- Vars
- S(h);CHECK,OGATE,XP(E)::R(K)+B(D),XS(h)
- S(h);CHECK,OGATEB::R(K)+B(D),XS(h)
- Q(a);N_GUARD,XQ(I)::P(B),XP(b)
- R(e);N_GUARD,XQ(I)::B(J),XR(f)
- Q(a);N_GUARD::P(B),XP(b)
- R(e);OGATE::QAB(I)
- S(h);OGATEB::R(K)+B(D),XS(h)
- S(h);S_CUTR(e)::B(J),XR(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).