MESON Chess Problem Database
Problem Display
PID: 198831 (2bR2BB/p2npp2/1rQ4K/N2nP3/1P1k1p2/1Ppp1P2/3P2N1/8 w - - 0 1)
Langstaff, William A
1st HM., BCPS, 1921
#2
12 + 11
| 6490 | yacpdb | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Rb5
- 2.Qc4#
- 1...Rxc6+
- 2.Sxc6#
- 1...Rb7
- 2.Qc4#
- 1...Rb8
- 2.Qc4#
- 1...Se3
- 2.dxc3#
- 1...Sxb4
- 2.dxc3#
- 1...S5f6
- 2.Qc5#
- 1...Sc7
- 2.dxc3#
- 1...Sc5
- 2.Rxd5#
- 1...Sxe5
- 2.Rxd5#
- 2.dxc3#
- 1...S7f6
- 2.Qxc3#
- 1...Sb8
- 2.Rxd5#
- 2.dxc3#
- 1...Sf8
- 2.Rxd5#
- 2.dxc3#
- 1...e6
- 2.Qc4#
- 1...f6
- 2.Qxd5#
- 1...Rb5
- Tries
- 1.Se3?
- threat
- 2.Sf5#
- 1...Rxc6+
- 2.Sxc6#
- 1...Sxe3
- 2.dxc3#
- 1...Sxe5
- 2.Rxd5#
- 1...S5f6
- 2.Qxc3#
- 2.Qc5#
- 1...S7f6
- 2.Qxc3#
- 1...f6
- 2.Qxd5#
- 1...Sc5
- 2.Rxd5#
- 1...Sb8
- 2.Rxd5#
- 1...Sf8
- 2.Rxd5#
- 1...e6
- 2.Qc4#
- 1...f5
- 2.Sxf5#
- 1...fxe3!
- threat
- 1.Rxd7?
- threat
- 2.Rxd5#
- 2.dxc3#
- 1...Rxc6+
- 2.Sxc6#
- 1...cxd2
- 2.Rxd5#
- 1...f6
- 2.Rxd5#
- 2.Qxd5#
- 2.Qxc3#
- 1...Rb5
- 2.Qxc3#
- 2.Qc4#
- 2.dxc3#
- 1...c2
- 2.Rxd5#
- 1...e6
- 2.Qxc3#
- 2.Qc4#
- 2.Qc5#
- 2.dxc3#
- 1...Bxd7!
- threat
- 1.Qxb6+?
- 1...Sc5
- 2.Sc6#
- 2.Qxc5#
- 1...S7xb6
- 2.Sc6#
- 1...axb6
- 2.Sc6#
- 1...S5xb6!
- 1...Sc5
- 1.e6+?
- 1...S5f6
- 2.Qe4#
- 2.Qc5#
- 1...Se5
- 2.Rxd5#
- 2.Qxd5#
- 2.Qxc3#
- 2.Qc4#
- 2.Qc5#
- 2.dxc3#
- 1...S7f6
- 2.Rxd5#
- 2.Qxd5#
- 2.Qxc3#
- 1...f6!
- 1...S5f6
- 1.Se3?
- Keys
- 1.Sh4!
- threat
- 2.Sf5#
- 1...Rxc6+
- 2.Sxc6#
- 1...Sxe5
- 2.Rxd5#
- 1...S5f6
- 2.Qc5#
- 1...S7f6
- 2.Qxc3#
- 1...f6
- 2.Qxd5#
- 1...Se3
- 2.dxc3#
- 1...Sc5
- 2.Rxd5#
- 1...Sb8
- 2.Rxd5#
- 1...Sf8
- 2.Rxd5#
- 1...e6
- 2.Qc4#
- 1...f5
- 2.Sxf5#
- threat
- 1.Sh4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 5
- Sets
- R(f);N_PINQ(H)::QAR1(H)
- R(f);CHECK,XQ(H)::S(F),XR(f)
- S(e);N_GUARD,P_SPINS(h)::P(A),XP(a)
- S(e);N_GUARD,P_SPINS(h),XP(E)::P(A),XP(a)
- S(e);N_PINQ(H),P_SPINS(h)::QAB1(H)
- S(h);OGATE,P_SPINS(e)::R1(J),XS(e)
- S(h);N_PINQ(H),P_SPINS(e)::QAB1(H),XP(a)
- P(i);N_PINQ(H)::QAR1(H)
- P(j);N_PINQ(H)::QAR1(H),XS(e)
- Tries
- Try
- S(B);
- Threat
- S(B)
- Vars
- R(f);CHECK,XQ(H)::S(F),XR(f)
- S(e);N_GUARD,P_SPINS(h),SBLOCK,XS(B)::P(A),XP(a)
- S(h);OGATE,P_SPINS(e),XP(G)::R1(J),XS(e)
- S(h);N_PINQ(H),P_SPINS(e)::QAB1(H),XP(a)
- P(j);N_PINQ(H)::QAR1(H),XS(e)
- S(h);OGATE,P_SPINS(e)::R1(J),XS(e)
- P(i);N_PINQ(H)::QAR1(H)
- P(j);::S(B),XP(j)
- Refutation
- P(d);XS(B)
- Try
- R(J);P_PINS(e),XS(h)
- Threat
- DUALS(2)
- Vars
- R(f);CHECK,XQ(H)::S(F),XR(f)
- P(a);XP(A)::R1(J),XS(e)
- P(a);::R1(J),XS(e)
- Refutation
- B(k);N_SPINS(e),XR(J)
- Try
- Q(H);CHECK,N_SPINQ(H),XR(f)
- Vars
- S(h);P_SPINS(e),XQ(H)::S(F)
- P(g);XQ(H)::S(F)
- Refutation
- S(e);P_SPINS(h),XQ(H)
- Try
- P(G);CHECK,N_SPINQ(H)
- Refutation
- P(j);P_SPINP(j)
- Try
- Actual
- S(B);
- Threat
- S(B)
- Vars
- R(f);CHECK,XQ(H)::S(F),XR(f)
- S(h);OGATE,P_SPINS(e),XP(G)::R1(J),XS(e)
- S(e);N_PINQ(H),P_SPINS(h)::QAB1(H)
- S(h);N_PINQ(H),P_SPINS(e)::QAB1(H),XP(a)
- P(j);N_PINQ(H)::QAR1(H),XS(e)
- S(e);N_GUARD,P_SPINS(h),SBLOCK::P(A),XP(a)
- S(h);OGATE,P_SPINS(e)::R1(J),XS(e)
- P(i);N_PINQ(H)::QAR1(H)
- P(j);::S(B),XP(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).