MESON Chess Problem Database
Problem Display
PID: 271995 (5bB1/pp2N3/1B4b1/K2R1qnp/N1k2PR1/2p5/P3P1Q1/8 w - - 0 1)
Hawes, Frederick Thomas
Ravenscroft, Frank
The Problemist, 1957
#2
11 + 9
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Rd4#
- 1...Qc2
- 2.Rd4#
- 1...Qd3
- 2.Rd4#
- 1...Qe4
- 2.Rd4#
- 1...Qxg4
- 2.Rd4#
- 1...Qe6
- 2.Rd4#
- 1...Qd7
- 2.Rd4#
- 1...Qc8
- 2.Rd4#
- 1...Qxf4
- 2.Rd4#
- 1...Qxd5+
- 2.Bxd5#
- 2.Qxd5#
- 1...Qf6
- 2.Rd4#
- 1...Qf7
- 2.Rd4#
- 1...axb6+
- 2.Sxb6#
- 1...Qb1
- Tries
- 1.Sxf5?
- threat
- 2.Se3#
- 2.Rd4#
- 2.Rc5#
- 1...axb6+
- 2.Sxb6#
- 1...Bxf5
- 2.Rd4#
- 1...Bf7
- 2.Se3#
- 2.Rd4#
- 1...Bc5
- 2.Rd4#
- 2.Rxc5#
- 1...Se6
- 2.Se3#
- 2.Rd4#
- 1...Sf7
- 2.Se3#
- 2.Rd4#
- 2.Qe4#
- 1...Bb4+!
- threat
- 1.Bc5?
- threat
- 2.Rd4#
- 1...Qxd5
- 2.Bxd5#
- 2.Qxd5#
- 1...b6+!
- threat
- 1.Bxa7?
- threat
- 2.Sb6#
- 1...Qxd5+
- 2.Bxd5#
- 2.Qxd5#
- 1...b6+
- 2.Sxb6#
- 1...Qb1
- 2.Rd4#
- 1...Qe6
- 2.Rd4#
- 1...Qf6
- 2.Rd4#
- 1...c2!
- threat
- 1.Rxf5+?
- 1...Se6
- 2.Bxe6#
- 2.Qe4#
- 2.Qd5#
- 1...Sf7
- 2.Qe4#
- 2.Qd5#
- 1...Bf7!
- 1...Se6
- 1.Qe4+?
- 1...Qxe4
- 2.Rd4#
- 1...Sxe4!
- 1...Qxe4
- 1.Qg1?
- threat
- 2.Rc5#
- 2.Qd4#
- 2.Qc5#
- 1...Qxd5+
- 2.Bxd5#
- 2.Qc5#
- 1...axb6+
- 2.Sxb6#
- 1...Qxf4
- 2.Rd4#
- 2.Rc5#
- 2.Qc5#
- 1...Bxe7
- 2.Rc5#
- 2.Qd4#
- 1...Bf7
- 2.Qd4#
- 2.Qc5#
- 1...Qd3
- 2.Rd4#
- 2.Rc5#
- 2.Qc5#
- 1...Qe4
- 2.Rd4#
- 2.Rc5#
- 2.Qc5#
- 1...Qc8
- 2.Rd4#
- 2.Rc5#
- 2.Qd4#
- 1...Qe5
- 2.Rc5#
- 2.Qc5#
- 1...Qf6
- 2.Rd4#
- 2.Rc5#
- 2.Qc5#
- 1...Bg7
- 2.Rc5#
- 2.Qc5#
- 1...Sf3
- 2.Rc5#
- 2.Qc5#
- 1...Se4
- 2.Rc5#
- 2.Qd4#
- 1...Sf7
- 2.Qd4#
- 2.Qc5#
- 1...Se6!
- threat
- 1.Qf2?
- threat
- 2.Rc5#
- 2.Qd4#
- 2.Qc5#
- 1...Qxd5+
- 2.Bxd5#
- 2.Qc5#
- 1...axb6+
- 2.Sxb6#
- 1...Qxf4
- 2.Rd4#
- 2.Rc5#
- 2.Qc5#
- 1...Bxe7
- 2.Rc5#
- 2.Qd4#
- 1...Bf7
- 2.Qd4#
- 2.Qc5#
- 1...Qd3
- 2.Rd4#
- 2.Rc5#
- 2.Qc5#
- 1...Qe4
- 2.Rd4#
- 2.Rc5#
- 2.Qc5#
- 1...Qc8
- 2.Rd4#
- 2.Rc5#
- 2.Qd4#
- 1...Qe5
- 2.Rc5#
- 2.Qc5#
- 1...Qf6
- 2.Rd4#
- 2.Rc5#
- 2.Qc5#
- 1...Bg7
- 2.Rc5#
- 2.Qc5#
- 1...Sf3
- 2.Rc5#
- 2.Qc5#
- 1...Se4
- 2.Rc5#
- 2.Qd4#
- 1...Sf7
- 2.Qd4#
- 2.Qc5#
- 1...Se6!
- threat
- 1.e4?
- threat
- 2.Qf1#
- 2.Qe2#
- 1...axb6+
- 2.Sxb6#
- 1...Qxe4
- 2.Rd4#
- 1...Qxg4
- 2.Rd4#
- 1...Qxf4
- 2.Rd4#
- 2.Qe2#
- 1...Qxd5+!
- threat
- 1.fxg5+?
- 1...Qe4
- 2.Rd4#
- 1...Qxg4
- 2.Rd4#
- 1...Qf4
- 2.Rd4#
- 1...hxg4!
- 1...Qe4
- 1.Sxf5?
- Keys
- 1.Qf1!
- threat
- 2.e4#
- 1...Qxd5+
- 2.Bxd5#
- 1...axb6+
- 2.Sxb6#
- 1...Qxg4
- 2.Rd4#
- 1...Qxf4
- 2.Rd4#
- 1...Qb1
- 2.Rd4#
- 1...Qc2
- 2.Rd4#
- 1...Qd3
- 2.Rd4#
- 1...Qe4
- 2.Rd4#
- 1...Se4
- 2.e3#
- threat
- 1.Qf1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 5
- Sets
- Q(c);N_PINR(H)::B(K)+R(H),DCHECK
- Q(c);N_PINR(H),XR(F)::B(K)+R(H),DCHECK
- Q(c);N_PINR(H)::R1(H)
- Q(c);N_PINR(H),P_SPINQ(c),XP(E)::B(K)+R(H),DCHECK
- P(g);CHECK,XB(I)::S(D),XP(g)
- Tries
- Try
- S(J);N_SPINR(H),XQ(c)
- Threat
- DUALS(3)
- Vars
- P(g);CHECK,XB(I)::S(D),XP(g)
- B(f);XS(J)::B(K)+R(H),DCHECK
- Refutation
- B(i);CHECK
- Try
- B(I);N_SPINR(H)
- Threat
- B(K)+R(H),DCHECK
- Refutation
- P(h);CHECK
- Try
- B(I);XP(g)
- Threat
- S(D)
- Vars
- P(h);CHECK::S(D),XP(h)
- Q(c);N_PINR(H)::B(K)+R(H),DCHECK
- Q(c);N_PINR(H)::R1(H)
- Refutation
- P(a);
- Try
- R(H);CHECK,N_SPINR(H),XQ(c)
- Refutation
- B(f);P_SPINB(f)
- Try
- Q(C);CHECK
- Vars
- Q(c);N_PINR(H),XQ(C)::B(K)+R(H),DCHECK
- Refutation
- S(d);XQ(C)
- Try
- Q(C);
- Threat
- DUALS(3)
- Vars
- P(g);CHECK,XB(I)::S(D),XP(g)
- Refutation
- S(d);
- Try
- Q(C);
- Threat
- DUALS(3)
- Vars
- P(g);CHECK,XB(I)::S(D),XP(g)
- Refutation
- S(d);
- Try
- P(B);
- Threat
- DUALS(2)
- Vars
- P(g);CHECK,XB(I)::S(D),XP(g)
- Q(c);N_PINR(H),XP(B)::B(K)+R(H),DCHECK
- Q(c);N_PINR(H),XR(F)::B(K)+R(H),DCHECK
- Refutation
- Q(c);CHECK,P_SPINQ(c),XR(H)
- Try
- P(E);CHECK,XS(d)
- Vars
- Q(c);N_PINR(H),P_SPINQ(c)::B(K)+R(H),DCHECK
- Q(c);N_PINR(H),XR(F)::B(K)+R(H),DCHECK
- Refutation
- P(e);XR(F)
- Try
- Actual
- Q(C);
- Threat
- QAB(C)+P(B)
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XR(H)::B(K),XQ(c)
- P(g);CHECK,XB(I)::S(D),XP(g)
- Q(c);N_PINR(H),XR(F)::B(K)+R(H),DCHECK
- Q(c);N_PINR(H),P_SPINQ(c),XP(E)::B(K)+R(H),DCHECK
- Q(c);N_PINR(H)::B(K)+R(H),DCHECK
- S(d);S_CUTQ(c)::QAB(C)+P(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).