MESON Chess Problem Database
Problem Display
PID: 66031 (4Q1n1/2p2n2/1p1B1pB1/1P1prN1r/4kN1R/2R1P1Pq/K3P3/6b1 w - - 0 1)
van Dooren, Rene
Scacchi e Scienze Applicate, 1992
#2
12 + 11
SOLUTION
- SOUND
- Sets
- 1...Qg2
- 2.Sxh5#
- 1...Qxf5
- 2.Sxh5#
- 1...Qxg3
- 2.Sxg3#
- 1...Rxf5
- 2.Sxh3#
- 1...Bxe3
- 2.Rxe3#
- 1...Sxd6
- 2.Sxd6#
- 1...cxd6
- 2.Sxd6#
- 1...Qg2
- Tries
- 1.Sxh5+?
- 1...Qg4
- 2.Rxg4#
- 1...Qxh4!
- 1...Qg4
- 1.Sd4+?
- 1...Qf5
- 2.Sxh5#
- 1...Rf5
- 2.Sxh3#
- 1...f5!
- 1...Qf5
- 1.Sh6+?
- 1...Qf5
- 2.Sxh5#
- 1...Rf5
- 2.Sxh3#
- 1...f5!
- 1...Qf5
- 1.Sg7+?
- 1...Qf5
- 2.Sfxh5#
- 1...Rf5
- 2.Sxh3#
- 1...f5!
- 1...Qf5
- 1.Bxe5?
- threat
- 2.Sd6#
- 1...Qxf5
- 2.Sxh5#
- 1...Rxf5
- 2.Sxh3#
- 1...Sd6
- 2.Sxd6#
- 1...Se7!
- threat
- 1.Rd3?
- threat
- 2.Rd4#
- 1...Qxf5
- 2.Sxh5#
- 1...Rxf5
- 2.Sxh3#
- 1...Bxe3
- 2.Rxe3#
- 1...d4
- 2.Rxd4#
- 1...c5!
- threat
- 1.Rc4+?
- 1...d4
- 2.Rxd4#
- 1...dxc4!
- 1...d4
- 1.Qa8?
- threat
- 2.Rc4#
- 1...Qxf5
- 2.Sxh5#
- 1...Rexf5
- 2.Qxd5#
- 1...Rhxf5
- 2.Sxh3#
- 1...Bxe3
- 2.Rxe3#
- 1...Sxd6
- 2.Sxd6#
- 1...c6!
- threat
- 1.Sxh5+?
- Keys
- 1.Qc6!
- threat
- 2.Rc4#
- 1...Qxf5
- 2.Sxh5#
- 1...Rexf5
- 2.Qxd5#
- 1...Rhxf5
- 2.Sxh3#
- 1...Bxe3
- 2.Rxe3#
- 1...Sxd6
- 2.Sxd6#
- threat
- 1.Qc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 3
- Sets
- Q(b);N_GUARD,P_PINP(B)::R(G)+S(F),XR(f)
- Q(b);N_GUARD,P_SPINQ(b),XS(I)::R(G)+S(F),XR(f)
- Q(b);XP(E)::B(K)+S(I),DCHECK,XQ(b)
- R(f);N_GUARD,XS(I)::R(G)+S(F),XQ(b)
- B(a);OGATE,XP(D)::R1(C),XB(a)
- S(j);XB(J)::B(K)+S(I),DCHECK,XS(j)
- P(i);XB(J)::B(K)+S(I),DCHECK,XP(i)
- Tries
- Try
- S(F);CHECK,XR(f)
- Vars
- Q(b);N_GUARD,P_SPINQ(b)::R(G),XQ(b)
- Refutation
- Q(b);XR(G)
- Try
- S(I);CHECK
- Vars
- Q(b);P_SPINQ(b)::R(G)+S(F),XR(f)
- R(f);::R(G)+S(F),XQ(b)
- Refutation
- P(h);P_SPINP(h)
- Try
- S(I);CHECK
- Vars
- Q(b);P_SPINQ(b)::R(G)+S(F),XR(f)
- R(f);::R(G)+S(F),XQ(b)
- Refutation
- P(h);P_SPINP(h)
- Try
- S(I);CHECK
- Vars
- Q(b);P_SPINQ(b)::R(G)+S(F),XR(f)
- R(f);::R(G)+S(F),XQ(b)
- Refutation
- P(h);P_SPINP(h)
- Try
- B(J);XR(e)
- Threat
- B(K)+S(I),DCHECK
- Vars
- Q(b);N_GUARD,P_SPINQ(b),XS(I)::R(G)+S(F),XR(f)
- R(f);N_GUARD,P_SPINR(f),XS(I)::R(G)+S(F),XQ(b)
- S(j);::B(K)+S(I),DCHECK,XS(j)
- Refutation
- S(k);
- Try
- R(C);
- Threat
- R1(C)
- Vars
- Q(b);N_GUARD,P_SPINQ(b),XS(I)::R(G)+S(F),XR(f)
- R(f);N_GUARD,XS(I)::R(G)+S(F),XQ(b)
- B(a);OGATE,XP(D)::R1(C),XB(a)
- P(d);::R1(C),XP(d)
- Refutation
- P(i);
- Try
- R(C);CHECK
- Vars
- P(d);P_SPINP(d)::R1(C),XP(d)
- Refutation
- P(d);XR(C)
- Try
- Q(L);N_PINR(e),P_PINP(d)
- Threat
- R(C)
- Vars
- Q(b);N_GUARD,P_SPINQ(b),XS(I)::R(G)+S(F),XR(f)
- R(e);N_GUARD,P_SPINR(e),XS(I)::QAB1(L),XP(d)
- R(f);N_GUARD,P_SPINR(f),XS(I)::R(G)+S(F),XQ(b)
- B(a);OGATE,XP(D)::R1(C),XB(a)
- S(j);XB(J)::B(K)+S(I),DCHECK,XS(j)
- Refutation
- P(i);N_SPINP(d)
- Try
- Actual
- Q(L);N_PINR(e),P_PINP(d)
- Threat
- R(C)
- Vars
- Q(b);N_GUARD,P_SPINQ(b),XS(I)::R(G)+S(F),XR(f)
- R(e);N_GUARD,P_SPINR(e),XS(I)::QAB1(L),XP(d)
- R(f);N_GUARD,P_SPINR(f),XS(I)::R(G)+S(F),XQ(b)
- B(a);OGATE,XP(D)::R1(C),XB(a)
- S(j);XB(J)::B(K)+S(I),DCHECK,XS(j)
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).