MESON Chess Problem Database
Problem Display
PID: 49614 (b2r4/2P1R3/1P1p1p2/p2kP1r1/2R5/P2pn1bp/1N1N1P2/2K1Q3 w - - 0 1)
Markwick, Frederick W
The Problemist, 1930
#2
11 + 11
| 56 | The Problemist | 1943 |
SOLUTION
- SOUND
- Sets
- 1...Sd1
- 2.Qh1#
- 2.Qe4#
- 1...Sf1
- 2.Qe4#
- 1...Sc2
- 2.Qh1#
- 2.Qe4#
- 1...Sg2
- 2.Qe4#
- 1...Sg4
- 2.Qh1#
- 2.Qe4#
- 1...Sf5
- 2.Qh1#
- 2.Qe4#
- 1...dxe5
- 2.cxd8Q#
- 2.cxd8R#
- 1...Sd1
- Tries
- 1.Sd1?
- threat
- 2.Sc3#
- 2.Sxe3#
- 1...Rxe5
- 2.Sc3#
- 1...Bxf2
- 2.Sc3#
- 1...Bxe5
- 2.Sxe3#
- 1...Sxd1
- 2.Qh1#
- 2.Qe4#
- 1...dxe5
- 2.cxd8Q#
- 2.cxd8R#
- 1...Bf4
- 2.Sc3#
- 1...Sf1
- 2.Sc3#
- 2.Qe4#
- 1...Sc2
- 2.Sc3#
- 2.Qh1#
- 2.Qe4#
- 1...Sg2
- 2.Sc3#
- 2.Qe4#
- 1...Sg4
- 2.Sc3#
- 2.Qh1#
- 2.Qe4#
- 1...Sf5
- 2.Sc3#
- 2.Qh1#
- 2.Qe4#
- 1...Sxc4!
- threat
- 1.Sa4?
- threat
- 2.Sc3#
- 1...Sxc4
- 2.Qe4#
- 1...dxe5
- 2.cxd8Q#
- 2.cxd8R#
- 1...Sd1
- 2.Qh1#
- 2.Qe4#
- 1...Bxe5!
- threat
- 1.Sb1?
- threat
- 2.Sc3#
- 2.Qxa5#
- 1...d2+
- 2.Qxd2#
- 1...Bxe5
- 2.Qxa5#
- 1...dxe5
- 2.cxd8Q#
- 2.cxd8R#
- 1...Bc6
- 2.Sc3#
- 1...Sd1
- 2.Qxa5#
- 2.Qh1#
- 2.Qe4#
- 1...a4
- 2.Sc3#
- 2.Qa5#
- 1...Sxc4!
- threat
- 1.Sf1?
- threat
- 2.Sxe3#
- 2.Qxa5#
- 1...d2+
- 2.Qxd2#
- 1...Rxe5
- 2.Qxa5#
- 1...Bxf2
- 2.Qxa5#
- 1...Sxf1
- 2.Qxa5#
- 2.Qe4#
- 1...dxe5
- 2.cxd8Q#
- 2.cxd8R#
- 1...Bf4
- 2.Qxa5#
- 1...Bc6
- 2.Sxe3#
- 1...Sd1
- 2.Qxa5#
- 2.Qe4#
- 1...Sc2
- 2.Qxa5#
- 2.Qe4#
- 1...Sg2
- 2.Qxa5#
- 2.Qe4#
- 1...Sg4
- 2.Qxa5#
- 2.Qe4#
- 1...Sf5
- 2.Qxa5#
- 2.Qe4#
- 1...a4
- 2.Sxe3#
- 2.Qa5#
- 1...Sxc4!
- threat
- 1.Se4?
- threat
- 2.Sc3#
- 2.Sxf6#
- 2.Qxa5#
- 1...d2+
- 2.Qxd2#
- 1...Bxe5
- 2.Qxa5#
- 1...dxe5
- 2.Qxa5#
- 2.cxd8Q#
- 2.cxd8R#
- 1...fxe5
- 2.Sc3#
- 2.Sf6#
- 2.Qxa5#
- 1...Rf5
- 2.Sc3#
- 2.Qxa5#
- 1...Rg6
- 2.Sc3#
- 2.Qxa5#
- 1...Rf8
- 2.Sc3#
- 2.Qxa5#
- 1...Bc6
- 2.Sc3#
- 2.Sxf6#
- 1...Sd1
- 2.Sxf6#
- 2.Qxa5#
- 1...Sg4
- 2.Sc3#
- 2.Qxa5#
- 1...a4
- 2.Sc3#
- 2.Sxf6#
- 2.Qa5#
- 1...f5
- 2.Sc3#
- 2.Sf6#
- 2.Qxa5#
- 1...Sxc4!
- threat
- 1.Qxe3?
- threat
- 2.Qd4#
- 2.Qxd3#
- 2.Qf3#
- 2.Qe4#
- 1...Rxe5
- 2.Qd4#
- 2.Qxd3#
- 1...Bxf2
- 2.Qf3#
- 2.Qe4#
- 1...Bxe5
- 2.Qf3#
- 2.Qe4#
- 1...dxe5
- 2.Qc5#
- 2.Qxd3#
- 2.cxd8Q#
- 2.cxd8R#
- 1...fxe5
- 2.Qxd3#
- 2.Qe4#
- 1...Rf5
- 2.Qd4#
- 2.Qxd3#
- 2.Qe4#
- 1...f5
- 2.Qd4#
- 2.Qxd3#
- 2.Qf3#
- 1...Rg4!
- threat
- 1.cxd8Q?
- threat
- 2.Qxd6#
- 2.Qxa8#
- 1...Rxe5
- 2.Qxa8#
- 1...Bxe5
- 2.Qxa8#
- 1...fxe5
- 2.Qxa8#
- 1...Rg8
- 2.Qxd6#
- 2.Qxg8#
- 1...Bc6
- 2.Qxd6#
- 1...Bb7
- 2.Qxd6#
- 1...Sf5
- 2.Qh1#
- 2.Qe4#
- 2.Qxa8#
- 1...Sxc4!
- threat
- 1.Sd1?
- Keys
- 1.Sb3!
- threat
- 2.Qxa5#
- 1...d2+
- 2.Qxd2#
- 1...Sxc4
- 2.Qh1#
- 1...dxe5
- 2.cxd8Q#
- 2.cxd8R#
- 1...Bc6
- 2.Rd4#
- 1...a4
- 2.Qa5#
- threat
- 1.Sb3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 2
- Sets
- S(b);OGATE::QAB1(B)
- P(h);XP(H)::PXR(k)=Q
- Tries
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- R(g);XP(H)::S(C)
- B(c);XP(E)::S(C)
- B(c);XP(H)::S(C),XS(b)
- P(h);XP(H)::PXR(k)=Q
- B(c);::S(C)
- Refutation
- S(b);XR(G)
- Try
- S(C);
- Threat
- S(C)
- Vars
- S(b);OGATE,XR(G)::QAB1(B)
- P(h);XP(H)::PXR(k)=Q
- Refutation
- B(c);XP(H)
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- P(a);CHECK,OGATEB::QAR(B),XP(a)
- B(c);XP(H)::QAR(B),XP(e)
- P(h);XP(H)::PXR(k)=Q
- B(j);::S(D)
- Refutation
- S(b);XR(G)
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- P(a);CHECK,OGATEB::QAR(B),XP(a)
- R(g);XP(H)::QAR(B),XP(e)
- B(c);XP(E)::QAR(B),XP(e)
- P(h);XP(H)::PXR(k)=Q
- B(c);::QAR(B),XP(e)
- B(j);::S(D),XS(b)
- Refutation
- S(b);XR(G)
- Try
- S(D);
- Threat
- DUALS(3)
- Vars
- P(a);CHECK,OGATEB::QAR(B),XP(a)
- B(c);XP(H)::QAR(B),XP(e)
- Refutation
- S(b);XR(G)
- Try
- Q(B);XS(b)
- Threat
- DUALS(4)
- Refutation
- R(g);
- Try
- P(J);P_PINP(h),XR(k)
- Threat
- DUALS(2)
- Vars
- R(g);XP(H)::QAB(J),XB(j)
- B(c);XP(H)::QAB(J),XB(j)
- P(i);XP(H)::QAB(J),XB(j)
- B(j);::QAR1(J),XP(h)
- Refutation
- S(b);XR(G)
- Try
- Actual
- S(D);
- Threat
- QAR(B),XP(e)
- Vars
- P(a);CHECK,OGATEB::QAR(B),XP(a)
- S(b);N_GUARD,XR(G)::QAB(B)
- P(h);XP(H)::PXR(k)=Q
- B(j);SBLOCK::R1(G)
- P(e);::QAR(B)
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).