MESON Chess Problem Database
Problem Display
PID: 138836 (1n2K3/Q3n3/2p1k1p1/2BNrNP1/1P2q3/5P2/3b2B1/3RR3 w - - 0 1)
Melhuish, George W
Good Companions (December), 1918
#2
11 + 8
| 3391 | Het Half Pin Thema | 1924 |
SOLUTION
- SOUND
- Sets
- 1...Qxd5
- 2.Sg7#
- 1...Qxf5
- 2.Sc7#
- 1...Bc1
- 2.Sg7#
- 1...Bxe1
- 2.Sg7#
- 1...Bc3
- 2.Sg7#
- 1...Be3
- 2.Sg7#
- 1...Bxb4
- 2.Sg7#
- 1...Bf4
- 2.Sg7#
- 1...Bxg5
- 2.Sg7#
- 1...Sxd5
- 2.Sg7#
- 2.Qf7#
- 1...Sxf5
- 2.Sc7#
- 2.Qf7#
- 1...Sc8
- 2.Qf7#
- 1...Sg8
- 2.Qf7#
- 1...Sa6
- 2.Qd7#
- 1...Sd7
- 2.Qxd7#
- 1...cxd5
- 2.Sg7#
- 1...gxf5
- 2.Sc7#
- 1...Qxd5
- Tries
- 1.Sde3?
- threat
- 2.Sg7#
- 2.Qxe7#
- 1...Qxf5
- 2.Qxe7#
- 1...Rxc5
- 2.Qxe7#
- 1...Rxf5
- 2.Qxe7#
- 1...Bxe3
- 2.Sg7#
- 1...Sxf5
- 2.Qf7#
- 1...gxf5
- 2.Qxe7#
- 1...Rd5
- 2.Qxe7#
- 1...Sd5
- 2.Sg7#
- 2.Qf7#
- 1...Sc8
- 2.Sg7#
- 2.Qf7#
- 1...Sg8
- 2.Sg7#
- 2.Qf7#
- 1...Sd7
- 2.Sg7#
- 2.Qxd7#
- 1...Qxe3!
- threat
- 1.Sd4+?
- 1...Kxd5
- 2.Qa2#
- 1...Qxd4!
- 1...Kxd5
- 1.fxe4?
- threat
- 2.Sc7#
- 2.Sd4#
- 2.Sg7#
- 2.Qxe7#
- 1...Rxd5
- 2.Qxe7#
- 1...Rxf5
- 2.Qxe7#
- 1...Bxg5
- 2.Sd4#
- 2.Sg7#
- 1...Sxd5
- 2.Sd4#
- 2.Sg7#
- 2.Qf7#
- 1...Sxf5
- 2.Sc7#
- 2.Qf7#
- 1...cxd5
- 2.Sd4#
- 2.Sg7#
- 2.Qxe7#
- 1...gxf5
- 2.Sc7#
- 2.Qxe7#
- 1...Bc3
- 2.Sf4#
- 2.Sc7#
- 2.Sg7#
- 2.Qxe7#
- 1...Be3
- 2.Sc7#
- 2.Sg7#
- 2.Qxe7#
- 1...Sc8
- 2.Sc7#
- 2.Sd4#
- 2.Sg7#
- 2.Qf7#
- 1...Sg8
- 2.Sc7#
- 2.Sd4#
- 2.Sg7#
- 2.Qf7#
- 1...Sa6
- 2.Sd4#
- 2.Sg7#
- 2.Qd7#
- 2.Qxe7#
- 1...Sd7
- 2.Sc7#
- 2.Sd4#
- 2.Sg7#
- 2.Qxd7#
- 1...Rxe4!
- threat
- 1.Sde3?
- Keys
- 1.f4!
- 1...Kxd5
- 2.Qa2#
- 1...Kxf5
- 2.Bh3#
- 1...Qxg2
- 2.Rxe5#
- 1...Qxd5
- 2.Sg7#
- 1...Qxf5
- 2.Sc7#
- 2.Qxe7#
- 1...Qxe1
- 2.Sd4#
- 2.Sg7#
- 1...Qxb4
- 2.Sg7#
- 2.Rxe5#
- 1...Qxf4
- 2.Sg7#
- 1...Rxd5
- 2.Sg7#
- 1...Rxf5
- 2.Sc7#
- 1...Bxe1
- 2.Sg7#
- 1...Bxb4
- 2.Sg7#
- 1...Bxf4
- 2.Sg7#
- 1...Sxd5
- 2.Sg7#
- 2.Qf7#
- 1...Sxf5
- 2.Sc7#
- 2.Qf7#
- 1...cxd5
- 2.Sg7#
- 1...gxf5
- 2.Sc7#
- 1...Qb1
- 2.Sd4#
- 2.Sg7#
- 2.Rxe5#
- 1...Qc2
- 2.Sd4#
- 2.Sg7#
- 2.Rxe5#
- 1...Qd3
- 2.Sg7#
- 2.Rxe5#
- 1...Qf3
- 2.Rxe5#
- 1...Qe2
- 2.Sd4#
- 2.Sg7#
- 1...Qe3
- 2.Sg7#
- 1...Qc4
- 2.Sg7#
- 2.Rxe5#
- 1...Qd4
- 2.Sxd4#
- 2.Sg7#
- 1...Bc1
- 2.Sg7#
- 1...Bc3
- 2.Sg7#
- 1...Be3
- 2.Sg7#
- 1...Sc8
- 2.Qf7#
- 1...Sg8
- 2.Qf7#
- 1...Sa6
- 2.Qd7#
- 1...Sd7
- 2.Qxd7#
- 1...Kxd5
- 1.f4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 8
- REMOVED MATES = 2
- Sets
- Q(b);P_SPINR(c),SBLOCK,XS(G)::S(H)
- Q(b);P_SPINR(c),SBLOCK,XS(H)::S(G)
- B(a);::S(H)
- B(a);XR(B)::S(H)
- B(a);XP(E)::S(H)
- B(a);XP(I)::S(H)
- S(g);OGATE::QAB1(J)
- S(h);N_GUARD::QAB1(J)
- S(h);N_GUARD::QAB1(J),XS(h)
- P(d);SBLOCK,XS(G)::S(H)
- P(f);SBLOCK,XS(H)::S(G)
- Tries
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- Q(b);XS(H)::QAR1(J),XS(g)
- R(c);XB(F)::QAR1(J),XS(g)
- R(c);XS(H)::QAR1(J),XS(g)
- B(a);XS(G)::S(H)
- S(g);OGATE,XS(H)::QAB1(J)
- P(f);XS(H)::QAR1(J),XS(g)
- R(c);::QAR1(J),XS(g)
- Refutation
- Q(b);XS(G)
- Try
- S(H);CHECK
- Vars
- K(e);S_FLIGHT,XS(G)::QAB(J)
- Refutation
- Q(b);P_SPINR(c),XS(H)
- Try
- P(D);XQ(b)
- Threat
- DUALS(4)
- Vars
- R(c);XS(G)::QAR1(J),XS(g)
- R(c);XS(H)::QAR1(J),XS(g)
- Refutation
- R(c);P_SPINR(c),XP(D)
- Try
- Actual
- P(D);
- Vars
- K(e);OGATEB,P_SPINB(a),P_SPINQ(b),S_FLIGHT,XS(G)::QAB(J)
- K(e);OGATEB,S_FLIGHT,XS(H)::B(C)
- Q(b);OGATE,P_SPINR(c),XB(C)::R1(B),XR(c)
- Q(b);P_SPINR(c),XS(G)::S(H)
- Q(b);P_SPINR(c),XP(D)::S(H)
- R(c);P_SPINQ(b),SBLOCK,XS(G)::S(H)
- R(c);P_SPINQ(b),SBLOCK,XS(H)::S(G)
- B(a);XR(B)::S(H)
- B(a);XP(E)::S(H)
- B(a);XP(D)::S(H)
- P(d);SBLOCK,XS(G)::S(H)
- P(f);SBLOCK,XS(H)::S(G)
- Q(b);OGATE,P_SPINR(c)::R1(B),XR(c)
- Q(b);::S(H)
- B(a);::S(H)
- S(g);OGATE::QAB1(J)
- S(h);N_GUARD::QAB1(J)
- S(h);N_GUARD::QAB1(J),XS(h)
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).