MESON Chess Problem Database
Problem Display
PID: 139648 (1b2Q3/4N3/2p3r1/R6p/3BknbR/5NK1/2PPpPB1/8 w - - 0 1)
Bridgwater, Ralph Herbert
The Problemist, 1937
#2
11 + 8
SOLUTION
- SOUND
- Sets
- 1...Rd6
- 2.Re5#
- 1...Be5
- 2.Rxe5#
- 1...Ba7
- 2.Re5#
- 1...Rd6
- Tries
- 1.Sf5+?
- 1...Re6
- 2.Sg5#
- 1...Be5
- 2.Rxe5#
- 2.Qxe5#
- 1...Se6+!
- 1...Re6
- 1.Sxc6+?
- 1...Re6
- 2.Sg5#
- 1...Be6+
- 2.Sg5#
- 1...Be5
- 2.Rxe5#
- 2.Qxe5#
- 1...Se6+!
- 1...Re6
- 1.Sxg6+?
- 1...Be6
- 2.d3#
- 1...Be5
- 2.Rxe5#
- 2.Qxe5#
- 1...Se6+!
- 1...Be6
- 1.Ba1?
- threat
- 2.Sg5#
- 2.Ra4#
- 1...Bxf3+
- 2.Qxg6#
- 1...Bh3+
- 2.Sg5#
- 1...Bf5+
- 2.Sg5#
- 1...Be6+
- 2.Sg5#
- 1...Bd7+
- 2.Sg5#
- 1...Bc8+
- 2.Sg5#
- 1...Sd3+
- 2.Se5#
- 1...Sh3+
- 2.Se5#
- 1...Sd5+
- 2.Se5#
- 1...Se6+
- 2.Se5#
- 1...Rg5
- 2.Sxg5#
- 2.Ra4#
- 1...Rd6
- 2.Sg5#
- 2.Re5#
- 1...Be5
- 2.Sg5#
- 2.Rxe5#
- 1...Bd6
- 2.Sg5#
- 1...Ba7
- 2.Sg5#
- 2.Re5#
- 1...c5
- 2.Sg5#
- 1...Sxg2+!
- threat
- 1.Bb2?
- threat
- 2.Sg5#
- 2.Ra4#
- 1...Bxf3+
- 2.Qxg6#
- 1...Bh3+
- 2.Sg5#
- 1...Bf5+
- 2.Sg5#
- 1...Be6+
- 2.Sg5#
- 1...Bd7+
- 2.Sg5#
- 1...Bc8+
- 2.Sg5#
- 1...Sd3+
- 2.Se5#
- 1...Sh3+
- 2.Se5#
- 1...Sd5+
- 2.Se5#
- 1...Se6+
- 2.Se5#
- 1...Rg5
- 2.Sxg5#
- 2.Ra4#
- 1...Rd6
- 2.Sg5#
- 2.Re5#
- 1...Be5
- 2.Sg5#
- 2.Rxe5#
- 1...Bd6
- 2.Sg5#
- 1...Ba7
- 2.Sg5#
- 2.Re5#
- 1...c5
- 2.Sg5#
- 1...Sxg2+!
- threat
- 1.Bc3?
- threat
- 2.Sg5#
- 2.Ra4#
- 1...Bxf3+
- 2.Qxg6#
- 1...Bh3+
- 2.Sg5#
- 1...Bf5+
- 2.Sg5#
- 1...Be6+
- 2.Sg5#
- 1...Bd7+
- 2.Sg5#
- 1...Bc8+
- 2.Sg5#
- 1...Sd3+
- 2.Se5#
- 1...Sh3+
- 2.Se5#
- 1...Sd5+
- 2.Se5#
- 1...Se6+
- 2.Se5#
- 1...Rg5
- 2.Sxg5#
- 2.Ra4#
- 1...Rd6
- 2.Sg5#
- 2.Re5#
- 1...Be5
- 2.Sg5#
- 2.Rxe5#
- 1...Bd6
- 2.Sg5#
- 1...Ba7
- 2.Sg5#
- 2.Re5#
- 1...c5
- 2.Sg5#
- 1...Sxg2+!
- threat
- 1.Be5?
- threat
- 2.Sg5#
- 2.Ra4#
- 1...Bxf3+
- 2.Qxg6#
- 1...Bh3+
- 2.Sg5#
- 1...Bf5+
- 2.Sg5#
- 1...Be6+
- 2.Sg5#
- 1...Bd7+
- 2.Sg5#
- 1...Bc8+
- 2.Sg5#
- 1...Bxe5
- 2.Rxe5#
- 1...Sxg2
- 2.Ra4#
- 2.Qxg6#
- 2.d3#
- 1...Rg5
- 2.Sxg5#
- 2.Ra4#
- 1...Rd6
- 2.Sg5#
- 1...Bd6
- 2.Sg5#
- 1...Ba7
- 2.Sg5#
- 1...Sd3
- 2.Se1#
- 2.Sg1#
- 2.Sh2#
- 2.Sd4#
- 2.Sg5#
- 2.Qxg6#
- 1...Sd5
- 2.Qxg6#
- 2.d3#
- 1...Se6
- 2.Se1#
- 2.Sg1#
- 2.Sh2#
- 2.Sd4#
- 2.Sg5#
- 2.Qxc6#
- 2.Qxg6#
- 2.d3#
- 1...c5!
- threat
- 1.Qxg6+?
- 1...Bf5
- 2.Qxf5#
- 2.Qxc6#
- 2.d3#
- 1...Sxg6+!
- 1...Bf5
- 1.Sf5+?
- Keys
- 1.Ra4!
- threat
- 2.Sg5#
- 2.Ba1#
- 2.Bb2#
- 2.Bc3#
- 2.Be3#
- 2.Bc5#
- 2.Be5#
- 2.Bb6#
- 2.Bf6#
- 2.Ba7#
- 2.Bg7#
- 2.Bh8#
- 1...Bxf3+
- 2.Qxg6#
- 1...Bh3+
- 2.Sg5#
- 1...Bf5+
- 2.Sg5#
- 1...Be6+
- 2.Sg5#
- 1...Bd7+
- 2.Sg5#
- 1...Bc8+
- 2.Sg5#
- 1...Sxg2+
- 2.Be5#
- 1...Sd3+
- 2.Se5#
- 1...Sh3+
- 2.Se5#
- 2.Be5#
- 1...Sd5+
- 2.Se5#
- 1...Se6+
- 2.Se5#
- 1...Rg5
- 2.Sxg5#
- 2.Ba1#
- 2.Bb2#
- 2.Bc3#
- 2.Be3#
- 2.Bc5#
- 2.Be5#
- 2.Bb6#
- 2.Bf6#
- 2.Ba7#
- 2.Bg7#
- 2.Bh8#
- 1...Rd6
- 2.Sg5#
- 1...Rf6
- 2.Sg5#
- 2.Ba1#
- 2.Bb2#
- 2.Bc3#
- 2.Be3#
- 2.Bc5#
- 2.Be5#
- 2.Bb6#
- 2.Bxf6#
- 2.Ba7#
- 1...Rg7
- 2.Sg5#
- 2.Ba1#
- 2.Bb2#
- 2.Bc3#
- 2.Be3#
- 2.Bc5#
- 2.Be5#
- 2.Bb6#
- 2.Bf6#
- 2.Ba7#
- 2.Bxg7#
- 1...Be5
- 2.Sg5#
- 2.Bxe5#
- 1...Bd6
- 2.Sg5#
- 2.Bc5#
- 1...Ba7
- 2.Sg5#
- 2.Bc5#
- 2.Bb6#
- 2.Bxa7#
- 1...c5
- 2.Sg5#
- 2.Bxc5#
- threat
- 1.Ra4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 10
- REMOVED MATES = 2
- Sets
- R(g);S_CUTB(h)::R1(I)
- B(h);N_GUARD::R1(I),XB(h)
- B(h);N_GUARD::R1(I)
- Tries
- Try
- S(J);CHECK
- Vars
- R(g);P_SPINR(g)::B(D)+S(E),DCHECK
- Refutation
- S(c);CHECK,P_SPINB(d),P_SPINS(c)
- Try
- S(J);CHECK,XP(f)
- Vars
- R(g);P_SPINR(g)::B(D)+S(E),DCHECK
- B(d);CHECK,P_SPINB(d),P_SPINS(c)::B(D)+S(E),DCHECK
- Refutation
- S(c);CHECK,P_SPINB(d),P_SPINS(c)
- Try
- S(J);CHECK,XR(g)
- Vars
- B(d);P_SPINB(d),P_SPINS(c)::P(B)
- Refutation
- S(c);CHECK,P_SPINB(d),P_SPINS(c)
- Try
- B(G);
- Threat
- DUALS(2)
- Vars
- B(d);CHECK,N_GUARD,P_SPINB(d),P_SPINS(c),XS(E)::QAB(K),XR(g)
- B(d);CHECK,P_SPINS(c)::B(D)+S(E),DCHECK
- S(c);CHECK,N_GUARD,P_SPINB(d)::B(D)+S(E)
- B(h);::B(D)+S(E),DCHECK
- P(f);::B(D)+S(E),DCHECK
- Refutation
- S(c);CHECK,P_SPINB(d),XB(D)
- Try
- B(G);
- Threat
- DUALS(2)
- Vars
- B(d);CHECK,N_GUARD,P_SPINB(d),P_SPINS(c),XS(E)::QAB(K),XR(g)
- B(d);CHECK,P_SPINS(c)::B(D)+S(E),DCHECK
- S(c);CHECK,N_GUARD,P_SPINB(d)::B(D)+S(E)
- B(h);::B(D)+S(E),DCHECK
- P(f);::B(D)+S(E),DCHECK
- Refutation
- S(c);CHECK,P_SPINB(d),XB(D)
- Try
- B(G);
- Threat
- DUALS(2)
- Vars
- B(d);CHECK,N_GUARD,P_SPINB(d),P_SPINS(c),XS(E)::QAB(K),XR(g)
- B(d);CHECK,P_SPINS(c)::B(D)+S(E),DCHECK
- S(c);CHECK,N_GUARD,P_SPINB(d)::B(D)+S(E)
- B(h);::B(D)+S(E),DCHECK
- P(f);::B(D)+S(E),DCHECK
- Refutation
- S(c);CHECK,P_SPINB(d),XB(D)
- Try
- B(G);
- Threat
- DUALS(2)
- Vars
- B(d);CHECK,N_GUARD,P_SPINB(d),P_SPINS(c),XS(E)::QAB(K),XR(g)
- B(d);CHECK,P_SPINS(c)::B(D)+S(E),DCHECK
- B(h);OGATE,XB(G)::R1(I),XB(h)
- R(g);::B(D)+S(E),DCHECK
- B(h);::B(D)+S(E),DCHECK
- Refutation
- P(f);
- Try
- Q(K);CHECK,XR(g)
- Refutation
- S(c);CHECK,P_SPINB(d),XQ(K)
- Try
- Actual
- R(I);
- Threat
- DUALS(12)
- Vars
- B(d);CHECK,N_GUARD,P_SPINB(d),P_SPINS(c),XS(E)::QAB(K),XR(g)
- B(d);CHECK,P_SPINS(c)::B(D)+S(E),DCHECK
- S(c);CHECK,P_SPINB(d),XB(D)::R(I)+B(G)
- S(c);CHECK,N_GUARD,P_SPINB(d)::B(D)+S(E)
- R(g);::B(D)+S(E),DCHECK
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).