MESON Chess Problem Database
Problem Display
PID: 68931 (2n1Nq2/1K1p1B2/2P1R3/bRPkBP2/p3r1nr/1b1P4/2P3N1/1Q6 w - - 0 1)
de Smet, O
Het Belgisch Schaakbord (L'Echiquier Belge), 1957
#2
13 + 10
SOLUTION
- SOUND
- Sets
- 1...Qxc5
- 2.Re7#
- 1...Qd6
- 2.cxd6#
- 1...Qe7
- 2.Rxe7#
- 1...Qxe8
- 2.Rxe8#
- 1...Qh8
- 2.Re7#
- 1...Re1
- 2.Sf4#
- 1...Re2
- 2.Sf4#
- 1...Re3
- 2.Sf4#
- 1...Rf4
- 2.Sxf4#
- 1...Rxe5
- 2.Rd6#
- 1...Be1
- 2.Sc7#
- 1...Bd2
- 2.Sc7#
- 1...Bc3
- 2.Sc7#
- 1...Bb4
- 2.Sc7#
- 1...Bc7
- 2.Sxc7#
- 1...Sf2
- 2.Sf6#
- 1...Sh2
- 2.Sf6#
- 1...Se3
- 2.Sf6#
- 1...Sxe5
- 2.Rd6#
- 1...Sf6
- 2.Sxf6#
- 1...Sh6
- 2.Sf6#
- 1...Sb6
- 2.Sc7#
- 1...Sd6+
- 2.cxd6#
- 1...d6
- 2.cxd6#
- 1...Qxc5
- Tries
- 1.Se3+?
- 1...Sxe3
- 2.Sf6#
- 1...Rxe3!
- 1...Sxe3
- 1.Qa1?
- threat
- 2.Rd6#
- 1...Sd6+
- 2.Rxd6#
- 2.cxd6#
- 1...dxe6
- 2.Bxe6#
- 1...Qd6
- 2.Rxd6#
- 2.cxd6#
- 1...Rd4
- 2.Qxd4#
- 1...Bc3
- 2.Sc7#
- 1...d6
- 2.Rxd6#
- 2.cxd6#
- 1...Qxf7!
- threat
- 1.Qb2?
- threat
- 2.Rd6#
- 1...Sd6+
- 2.Rxd6#
- 2.cxd6#
- 1...dxe6
- 2.Bxe6#
- 1...Qd6
- 2.Rxd6#
- 2.cxd6#
- 1...Rd4
- 2.Qxd4#
- 1...Bc3
- 2.Sc7#
- 1...d6
- 2.Rxd6#
- 2.cxd6#
- 1...Qxf7!
- threat
- 1.Qxb3+?
- 1...Rc4
- 2.Sf4#
- 2.Qxc4#
- 1...axb3!
- 1...Rc4
- 1.c4+?
- 1...Bxc4
- 2.dxe4#
- 1...Rxc4!
- 1...Bxc4
- 1.dxe4+?
- 1...Kc4
- 2.Qf1#
- 1...Kxe4!
- 1...Kc4
- 1.Se3+?
- Keys
- 1.Qe1!
- threat
- 2.Qxe4#
- 1...Sd6+
- 2.cxd6#
- 1...Rxe1
- 2.Sf4#
- 1...Rxe5
- 2.Rd6#
- 1...Bxe1
- 2.Sc7#
- 1...Sxe5
- 2.Rd6#
- 1...Re2
- 2.Sf4#
- 1...Re3
- 2.Sf4#
- 1...Rb4
- 2.Rd6#
- 1...Rc4
- 2.Rd6#
- 1...Rd4
- 2.Rd6#
- 1...Rf4
- 2.Sxf4#
- 2.Rd6#
- 1...Sf2
- 2.Sf6#
- 1...Sh2
- 2.Sf6#
- 1...Se3
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sh6
- 2.Sf6#
- threat
- 1.Qe1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 12
- Sets
- Q(j);N_GUARD,P_SPINQ(j),XP(F)::B(L)+R(J)
- Q(j);OGATE::R(E)+P(F),XQ(j)
- Q(j);N_GUARD::B(L)+R(J),XQ(j)
- Q(j);OGATE,XS(M)::B(L)+R(J),XQ(j)
- Q(j);N_GUARD::B(L)+R(J)
- R(c);N_GUARD::S(C)
- R(c);N_GUARD::S(C),XR(c)
- R(c);SBLOCK,XB(G)::B(L)+R(J),DCHECK
- B(f);N_GUARD::S(M)
- B(f);N_GUARD::S(M),XB(f)
- S(d);N_GUARD::S(M)
- S(d);SBLOCK,XB(G)::B(L)+R(J),DCHECK
- S(d);N_GUARD::S(M),XS(d)
- S(i);S_CUTB(f)::S(M)
- S(i);CHECK,OGATE::R(E)+P(F),XS(i)
- P(h);OGATE::R(E)+P(F),XP(h)
- Tries
- Try
- S(C);CHECK
- Vars
- S(d);XS(C)::S(M)
- Refutation
- R(c);XS(C)
- Try
- Q(A);
- Threat
- B(L)+R(J),DCHECK
- Vars
- P(h);OGATE,P_SPINP(h),XR(J)::B(L),XP(h)
- R(c);N_GUARD::QAR1(A),XR(c)
- B(f);N_GUARD::S(M)
- Refutation
- Q(j);XB(L)
- Try
- Q(A);
- Threat
- B(L)+R(J),DCHECK
- Vars
- P(h);OGATE,P_SPINP(h),XR(J)::B(L),XP(h)
- R(c);N_GUARD::QAR1(A),XR(c)
- B(f);N_GUARD::S(M)
- Refutation
- Q(j);XB(L)
- Try
- Q(A);CHECK,XB(a)
- Refutation
- P(b);XQ(A)
- Try
- P(B);CHECK
- Vars
- B(a);SBLOCK,XP(B)::P(D),XR(c)
- Refutation
- R(c);XP(B)
- Try
- P(D);CHECK,XR(c)
- Vars
- K(g);S_FLIGHT::QAB(A)
- Refutation
- K(g);S_FLIGHT,XP(D)
- Try
- Actual
- Q(A);
- Threat
- QAB1(A),XR(c)
- Vars
- S(i);CHECK,OGATE::R(E)+P(F),XS(i)
- R(c);N_GUARD,XQ(A)::S(C)
- R(c);XB(G)::B(L)+R(J),DCHECK
- B(f);N_GUARD,XQ(A)::S(M)
- S(d);SBLOCK,XB(G)::B(L)+R(J),DCHECK
- R(c);N_GUARD::S(C)
- R(c);P_PINR(E)::B(L)+R(J),DCHECK
- R(c);::B(L)+R(J),DCHECK
- S(d);N_GUARD::S(M)
- S(d);N_GUARD::S(M),XS(d)
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).