MESON Chess Problem Database
Problem Display
PID: 17361 (n1nQ3K/2b1r2p/PPk1r2R/1N1N4/PP1p4/1p6/2b5/q1R3BB w - - 0 1)
Gamage, Frederick
HM., Enroque!!, 1946
#2
12 + 11
| 14773 | The Best American Chess Problems of 1946 | 1948 |
| 5397 | Frederick Gamage (Prcic) | 2004 |
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Sxd4#
- 1...Qxc1
- 2.Sxd4#
- 1...Qa2
- 2.Sxd4#
- 1...Qa3
- 2.Sxd4#
- 1...Qxa4
- 2.Sxd4#
- 1...Re8+
- 2.Qxe8#
- 1...Bh2
- 2.Se3#
- 2.Sf4#
- 2.Sxe7#
- 1...Bg3
- 2.Se3#
- 2.Sf4#
- 2.Sxe7#
- 1...Bf4
- 2.Se3#
- 2.Sxf4#
- 2.Sxe7#
- 1...Be5+
- 2.Sf6#
- 1...Bxb6
- 2.Se3#
- 2.Sf4#
- 2.Sxb6#
- 2.Sdc7#
- 2.Sxe7#
- 1...Bd6
- 2.Sxe7#
- 1...Bb8
- 2.Se3#
- 2.Sf4#
- 2.Sxe7#
- 1...Saxb6
- 2.Sxe7#
- 1...Scxb6
- 2.Sa7#
- 2.Sxe7#
- 1...Sd6
- 2.Sa7#
- 1...Sa7
- 2.Sxa7#
- 1...b2
- 2.Sxd4#
- 2.Rxc2#
- 1...d3+
- 2.Sdc3#
- 1...Qb1
- Tries
- 1.Bxd4?
- threat
- 2.Se3#
- 2.Sf4#
- 2.Sdxc7#
- 2.Sxe7#
- 1...Qxd4+
- 2.Sxd4#
- 1...Re8+
- 2.Qxe8#
- 1...Be5+
- 2.Sf6#
- 1...Qxc1
- 2.Sxe7#
- 1...Qxa4
- 2.Sdxc7#
- 1...Rxh6
- 2.Sxe7#
- 1...Bxb6
- 2.Se3#
- 2.Sf4#
- 2.Sxb6#
- 2.Sdc7#
- 2.Sxe7#
- 1...Saxb6
- 2.Sxb6#
- 2.Sxe7#
- 1...Scxb6
- 2.Sa7#
- 2.Sxb6#
- 2.Sxe7#
- 1...Qc3
- 2.Sxe7#
- 1...Rd6
- 2.Sxe7#
- 1...Rf6
- 2.Sxe7#
- 1...Rg6
- 2.Sxe7#
- 1...Rd7
- 2.Se7#
- 1...Rf7
- 2.Sf4#
- 2.Se7#
- 1...Rg7
- 2.Se7#
- 1...Bh2
- 2.Se3#
- 2.Sf4#
- 2.Sdc7#
- 2.Sxe7#
- 1...Bg3
- 2.Se3#
- 2.Sf4#
- 2.Sdc7#
- 2.Sxe7#
- 1...Bf4
- 2.Se3#
- 2.Sxf4#
- 2.Sdc7#
- 2.Sxe7#
- 1...Bd6
- 2.Sxe7#
- 1...Bb8
- 2.Se3#
- 2.Sf4#
- 2.Sdc7#
- 2.Sxe7#
- 1...Sd6
- 2.Sa7#
- 2.Sxe7#
- 1...Bxd8!
- threat
- 1.Rxc2+?
- 1...Qc3
- 2.Sxd4#
- 1...bxc2!
- 1...Qc3
- 1.Rxe6+?
- 1...Bd6
- 2.Se3#
- 2.Sf4#
- 2.Sf6#
- 2.Sxe7#
- 1...Sd6
- 2.Sa7#
- 1...Rxe6!
- 1...Bd6
- 1.Bxd4?
- Keys
- 1.b7!
- threat
- 2.bxa8Q#
- 2.bxa8B#
- 1...Re8+
- 2.Qxe8#
- 1...Be5+
- 2.Sf6#
- 1...d3+
- 2.Sdc3#
- 1...Qxc1
- 2.Sxd4#
- 2.bxa8Q#
- 2.bxa8B#
- 1...Qxa4
- 2.Sxd4#
- 1...Rxh6
- 2.bxa8Q#
- 2.bxa8B#
- 1...Bxd8
- 2.b8S#
- 1...Qb2
- 2.bxa8Q#
- 2.bxa8B#
- 1...Qc3
- 2.bxa8Q#
- 2.bxa8B#
- 1...Qb1
- 2.Sxd4#
- 2.bxa8Q#
- 2.bxa8B#
- 1...Qa2
- 2.Sxd4#
- 2.bxa8Q#
- 2.bxa8B#
- 1...Qa3
- 2.Sxd4#
- 2.bxa8Q#
- 2.bxa8B#
- 1...Rd6
- 2.bxa8Q#
- 2.bxa8B#
- 1...Rf6
- 2.bxa8Q#
- 2.bxa8B#
- 1...Rg6
- 2.bxa8Q#
- 2.bxa8B#
- 1...Rd7
- 2.bxa8Q#
- 2.bxa8B#
- 1...Rf7
- 2.bxa8Q#
- 2.bxa8B#
- 1...Rg7
- 2.bxa8Q#
- 2.bxa8B#
- 1...Bh2
- 2.Se3#
- 2.Sf4#
- 2.Sb6#
- 2.Sxe7#
- 1...Bg3
- 2.Se3#
- 2.Sf4#
- 2.Sb6#
- 2.Sxe7#
- 1...Bf4
- 2.Se3#
- 2.Sxf4#
- 2.Sb6#
- 2.Sxe7#
- 1...Ba5
- 2.Se3#
- 2.Sf4#
- 2.Sb6#
- 2.Sxe7#
- 2.b8S#
- 1...Bb6
- 2.Se3#
- 2.Sf4#
- 2.Sxb6#
- 2.Sdc7#
- 2.Sxe7#
- 2.b8S#
- 1...Bd6
- 2.Sxe7#
- 1...Bb8
- 2.Se3#
- 2.Sf4#
- 2.Sb6#
- 2.Sxe7#
- 1...Sab6
- 2.Sxe7#
- 1...Scb6
- 2.Sa7#
- 2.Sxe7#
- 1...Sd6
- 2.Sa7#
- 1...Sa7
- 2.Sxa7#
- 2.bxa8Q#
- 2.bxa8B#
- 1...b2
- 2.Sxd4#
- 2.Rxc2#
- 2.bxa8Q#
- 2.bxa8B#
- threat
- 1.b7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 5
- Sets
- Q(a);N_GUARD::S(F),XP(d)
- Q(a);N_GUARD,N_SPINB(b),XR(A)::S(F),XP(d)
- Q(a);N_GUARD,XP(D)::S(F),XP(d)
- R(h);CHECK,N_GUARD::QAB(K),XR(h)
- B(g);CHECK::B(C)+S(G)
- B(g);N_SPINR(f)::B(C)+S(G),DCHECK,XR(h)
- S(j);SBLOCK,XP(I)::B(C)+S(G),DCHECK,XR(h)
- S(k);N_GUARD,N_SPINR(f)::S(F)
- S(k);N_GUARD::S(F),XS(k)
- P(d);CHECK::B(C)+S(G)
- Tries
- Try
- B(B);P_SPINB(B),XP(d)
- Threat
- DUALS(4)
- Vars
- Q(a);CHECK,XB(B)::S(F),XQ(a)
- R(h);CHECK,N_GUARD::QAB(K),XR(h)
- B(g);CHECK,N_PINB(B)::B(C)+S(G)
- Q(a);N_PINB(B),N_SPINB(b),XR(A)::B(C)+S(G),DCHECK,XR(h)
- Q(a);N_PINB(B),XP(D)::B(C)+S(G),XB(g)
- R(f);N_SPINR(f),XR(J)::B(C)+S(G),DCHECK,XR(h)
- Q(a);N_SPINB(b)::B(C)+S(G),DCHECK,XR(h)
- R(f);::B(C)+S(G),DCHECK,XR(h)
- R(f);N_PINB(B)::B(C)+S(G),DCHECK,XR(h)
- R(h);::B(C)+S(G),DCHECK
- R(h);N_PINB(B)::B(C)+S(G),DCHECK
- B(g);N_SPINR(f)::B(C)+S(G),DCHECK,XR(h)
- Refutation
- B(g);XQ(K)
- Try
- R(A);CHECK,XB(b)
- Vars
- Q(a);P_SPINQ(a)::S(F),XP(d)
- Refutation
- P(c);XR(A)
- Try
- R(J);CHECK,XR(f)
- Vars
- S(k);P_SPINS(k)::S(F)
- Refutation
- R(h);XR(J)
- Try
- Actual
- P(I);
- Threat
- PXS(j)=Q
- Vars
- R(h);CHECK,N_GUARD::QAB(K),XR(h)
- B(g);CHECK::B(C)+S(G)
- P(d);CHECK::B(C)+S(G)
- Q(a);N_GUARD,XP(D)::S(F),XP(d)
- R(f);N_SPINR(f),XR(J)::PXS(j)=Q
- B(g);N_GUARD,XQ(K)::P=S
- Q(a);::PXS(j)=Q
- Q(a);N_SPINB(b)::PXS(j)=Q
- R(f);::PXS(j)=Q
- R(h);::PXS(j)=Q
- B(g);N_SPINR(f)::B(C)+S(G),DCHECK,XR(h)
- S(j);SBLOCK::B(C)+S(G),DCHECK,XR(h)
- S(k);N_GUARD,N_SPINR(f)::S(F)
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).