MESON Chess Problem Database
Problem Display
PID: 139502 (1b1R4/4Q3/2r2B2/p1RPN3/3k4/2nNpP2/4P2K/8 w - - 0 1)
Forster, Klaus
The Problemist, 2010
#2
10 + 6
SOLUTION
- SOUND
- Sets
- 1...Rxc5
- 2.Qxc5#
- 1...Ra6
- 2.Rc4#
- 1...Rb6
- 2.Rc4#
- 1...Rd6
- 2.Sc6#
- 1...Re6
- 2.Rc4#
- 1...Rxf6
- 2.Rc4#
- 1...Rc7
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 1...Bxe5+
- 2.Bxe5#
- 2.Qxe5#
- 1...Ba7
- 2.Sxc6#
- 1...Sxd5
- 2.Rdxd5#
- 1...Rxc5
- Tries
- 1.Kg1?
- threat
- 2.Sxc6#
- 1...Rxc5
- 2.Qxc5#
- 1...Rxf6
- 2.Rc4#
- 1...Bxe5
- 2.Bxe5#
- 2.Qxe5#
- 1...Ra6
- 2.Sc6#
- 2.Rc4#
- 1...Rb6
- 2.Sc6#
- 2.Rc4#
- 1...Rd6
- 2.Sc6#
- 1...Re6
- 2.Sc6#
- 2.Rc4#
- 1...Rc7
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 1...Rc8
- 2.Sc6#
- 1...Sxe2+!
- threat
- 1.Kh1?
- threat
- 2.Sxc6#
- 1...Rxc5
- 2.Qxc5#
- 1...Rxf6
- 2.Rc4#
- 1...Bxe5
- 2.Bxe5#
- 2.Qxe5#
- 1...Ra6
- 2.Sc6#
- 2.Rc4#
- 1...Rb6
- 2.Sc6#
- 2.Rc4#
- 1...Rd6
- 2.Sc6#
- 1...Re6
- 2.Sc6#
- 2.Rc4#
- 1...Rc7
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 1...Rc8
- 2.Sc6#
- 1...Sxe2!
- threat
- 1.Kg2?
- threat
- 2.Sxc6#
- 1...Rxc5
- 2.Qxc5#
- 1...Rxf6
- 2.Rc4#
- 1...Bxe5
- 2.Bxe5#
- 2.Qxe5#
- 1...Ra6
- 2.Sc6#
- 2.Rc4#
- 1...Rb6
- 2.Sc6#
- 2.Rc4#
- 1...Rd6
- 2.Sc6#
- 1...Re6
- 2.Sc6#
- 2.Rc4#
- 1...Rc7
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 1...Rc8
- 2.Sc6#
- 1...Sxe2!
- threat
- 1.Kh3?
- threat
- 2.Sxc6#
- 1...Rxc5
- 2.Qxc5#
- 1...Rxf6
- 2.Rc4#
- 1...Bxe5
- 2.Bxe5#
- 2.Qxe5#
- 1...Ra6
- 2.Sc6#
- 2.Rc4#
- 1...Rb6
- 2.Sc6#
- 2.Rc4#
- 1...Rd6
- 2.Sc6#
- 1...Re6
- 2.Sc6#
- 2.Rc4#
- 1...Rc7
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 1...Rc8
- 2.Sc6#
- 1...Sxe2!
- threat
- 1.Sc1?
- threat
- 2.Sb3#
- 1...Bxe5+
- 2.Bxe5#
- 1...Rb6
- 2.Rc4#
- 1...a4!
- threat
- 1.Rxc6?
- threat
- 2.Rc4#
- 2.Qc5#
- 1...Bxe5+
- 2.Bxe5#
- 2.Qxe5#
- 1...Ba7
- 2.Sc4#
- 2.Sg4#
- 2.Sg6#
- 2.Sf7#
- 2.Rc4#
- 2.Qxa7#
- 1...Sa4
- 2.Rc4#
- 1...Se4
- 2.Rc4#
- 1...Bd6!
- threat
- 1.Qa7?
- threat
- 2.Rc4#
- 1...Bxe5+
- 2.Bxe5#
- 1...Rxc5
- 2.Qxc5#
- 1...Bxa7
- 2.Sxc6#
- 1...Rd6
- 2.Sc6#
- 1...Bd6!
- threat
- 1.Qc7?
- threat
- 2.Sxc6#
- 1...Rxc5
- 2.Qxc5#
- 1...Rxf6
- 2.Rc4#
- 1...Rxc7
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 1...Sxe2
- 2.dxc6#
- 1...Ra6
- 2.Sc6#
- 2.Rc4#
- 1...Rb6
- 2.Sc6#
- 2.Rc4#
- 1...Rd6
- 2.Sc6#
- 1...Re6
- 2.Sc6#
- 2.Rc4#
- 1...Bxc7!
- threat
- 1.dxc6+?
- 1...Sd5
- 2.Rc4#
- 2.Rdxd5#
- 1...Bd6!
- 1...Sd5
- 1.Kg1?
- Keys
- 1.Sf4!
- threat
- 2.Sxc6#
- 1...Rxc5
- 2.Se6#
- 1...Rxf6
- 2.Rc4#
- 1...Bxe5
- 2.Bxe5#
- 1...Rd6
- 2.Rc4#
- 1...Bd6
- 2.Se6#
- 1...Ra6
- 2.Sc6#
- 2.Rc4#
- 1...Rb6
- 2.Sc6#
- 2.Rc4#
- 1...Re6
- 2.Sxe6#
- 2.Sc6#
- 2.Rc4#
- 1...Rc7
- 2.Se6#
- 2.Sed3#
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Seg6#
- 2.Sd7#
- 2.Sf7#
- 1...Rc8
- 2.Se6#
- 2.Sc6#
- threat
- 1.Sf4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 5
- Sets
- R(e);OGATE,XR(E)::QAB1(I),XR(e)
- R(e);N_GUARD::R1(E)
- R(e);N_PINS(G)::B(H)+S(G),DCHECK
- R(e);N_GUARD,XB(H)::R1(E)
- B(f);N_PINS(G)::B(H)+S(G),DCHECK,XR(e)
- S(a);OGATE,P_SPINS(a),XP(F)::R1(J),XS(a)
- Tries
- Try
- K(B);N_SPINS(G),S_FLIGHT
- Threat
- B(H)+S(G),DCHECK,XR(e)
- Vars
- R(e);OGATE,XR(E)::QAB1(I),XR(e)
- R(e);N_GUARD,XB(H)::R1(E)
- R(e);::B(H)+S(G),DCHECK
- Refutation
- S(a);CHECK,XP(A)
- Try
- K(B);N_SPINS(G),P-FLIGHT
- Threat
- B(H)+S(G),DCHECK,XR(e)
- Vars
- R(e);OGATE,XR(E)::QAB1(I),XR(e)
- R(e);N_GUARD,XB(H)::R1(E)
- R(e);::B(H)+S(G),DCHECK
- Refutation
- S(a);XP(A)
- Try
- K(B);N_SPINS(G),P-FLIGHT
- Threat
- B(H)+S(G),DCHECK,XR(e)
- Vars
- R(e);OGATE,XR(E)::QAB1(I),XR(e)
- R(e);N_GUARD,XB(H)::R1(E)
- R(e);::B(H)+S(G),DCHECK
- Refutation
- S(a);XP(A)
- Try
- K(B);N_SPINS(G),P-FLIGHT
- Threat
- B(H)+S(G),DCHECK,XR(e)
- Vars
- R(e);OGATE,XR(E)::QAB1(I),XR(e)
- R(e);N_GUARD,XB(H)::R1(E)
- R(e);::B(H)+S(G),DCHECK
- Refutation
- S(a);XP(A)
- Try
- S(C);
- Threat
- S(C)
- Vars
- B(f);CHECK,OGATE,P_SPINB(f),XS(G)::B(H),XB(f)
- R(e);N_GUARD::R1(E)
- Refutation
- P(d);
- Try
- R(E);XR(e)
- Threat
- DUALS(2)
- Vars
- S(a);::R1(E)
- Refutation
- B(f);
- Try
- Q(I);
- Threat
- QAB(I)+R(E),DCHECK
- Vars
- B(f);CHECK,OGATE,P_SPINB(f),XS(G)::B(H),XB(f)
- R(e);OGATE,P_SPINR(e),XR(E)::QAB1(I),XR(e)
- B(f);N_PINS(G),XQ(I)::B(H)+S(G),DCHECK,XR(e)
- R(e);N_PINS(G)::B(H)+S(G),DCHECK
- Refutation
- B(f);
- Try
- Q(I);N_SPINS(G)
- Threat
- B(H)+S(G),DCHECK,XR(e)
- Vars
- R(e);OGATE,XR(E)::QAB1(I),XR(e)
- R(e);N_GUARD,XB(H)::R1(E)
- S(a);N_GUARD,XP(A)::R(J)+P(F),XR(e)
- R(e);::B(H)+S(G),DCHECK
- Refutation
- B(f);P_PINS(G),XQ(I)
- Try
- P(F);CHECK,XR(e)
- Refutation
- B(f);P_SPINB(f)
- Try
- Actual
- S(C);N_SPINS(G)
- Threat
- B(H)+S(G),DCHECK,XR(e)
- Vars
- R(e);N_GUARD,XR(E)::S(C)
- R(e);N_GUARD,XB(H)::R1(E)
- B(f);OGATE,P_PINS(C),P_SPINB(f),XS(G)::B(H),XB(f)
- R(e);N_GUARD::R1(E)
- B(f);S_CUTR(e)::S(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).