MESON Chess Problem Database
Problem Display
PID: 51237 (rb3R1N/2PK2p1/2n1P3/3pk3/1PQ1r3/3B1n2/1N6/B4Rq1 w - - 0 1)
Hawes, Frederick Thomas
O'Keefe, John James
Manchester Guardian, 1955
#2
11 + 9
SOLUTION
- SOUND
- Sets
- 1...Qf2
- 2.Sg6#
- 1...Qh2
- 2.Sg6#
- 1...Qe3
- 2.Sg6#
- 1...Qd4
- 2.Sg6#
- 1...Qc5
- 2.Sg6#
- 1...Qb6
- 2.Sg6#
- 1...Qa7
- 2.Sg6#
- 1...Qxf1
- 2.Sg6#
- 1...Qh1
- 2.Sg6#
- 1...Qg6
- 2.Sxg6#
- 1...Re1
- 2.Rf5#
- 2.Qf4#
- 1...Re2
- 2.Rf5#
- 2.Qf4#
- 1...Re3
- 2.Rf5#
- 2.Qf4#
- 1...Rxc4
- 2.Sxc4#
- 1...Rd4
- 2.Rf5#
- 1...Rf4
- 2.Qxf4#
- 1...Rg4
- 2.Rf5#
- 1...Rh4
- 2.Rf5#
- 1...Se1
- 2.Sf7#
- 2.R1f5#
- 2.R8f5#
- 1...Sd2
- 2.Sf7#
- 2.R1f5#
- 2.R8f5#
- 1...Sh2
- 2.Sf7#
- 2.R1f5#
- 2.R8f5#
- 1...Sfd4
- 2.Sf7#
- 1...Sh4
- 2.Sf7#
- 1...Sg5
- 2.Sg6#
- 2.R1f5#
- 2.R8f5#
- 1...d4
- 2.Qb5#
- 2.Qc5#
- 1...g5
- 2.Sg6#
- 1...Qf2
- Tries
- 1.Sa4+?
- 1...Qd4
- 2.Sg6#
- 1...Rd4
- 2.Rf5#
- 1...Sfd4
- 2.Sf7#
- 2.R1f5#
- 2.R8f5#
- 1...d4
- 2.Qb5#
- 2.Qc5#
- 1...Scd4!
- 1...Qd4
- 1.Bb1?
- threat
- 2.Sd3#
- 1...Rxc4
- 2.Sxc4#
- 1...Rd4
- 2.Rf5#
- 1...dxc4!
- threat
- 1.Bc2?
- threat
- 2.Sd3#
- 1...Rxc4
- 2.Sxc4#
- 1...Rd4
- 2.Rf5#
- 1...dxc4!
- threat
- 1.R1xf3?
- threat
- 2.Sf7#
- 2.R3f5#
- 2.R8f5#
- 1...Rxc4
- 2.Sxc4#
- 1...Sd4
- 2.Sf7#
- 1...Qf2
- 2.Sg6#
- 2.Sf7#
- 2.R8f5#
- 1...Qf1
- 2.Sg6#
- 2.Sf7#
- 2.R8f5#
- 1...Qg4
- 2.Sf7#
- 1...Qg5
- 2.Sf7#
- 1...Qg6
- 2.Sxg6#
- 1...Rf4
- 2.Qxf4#
- 1...Se7
- 2.Sf7#
- 1...Sd8
- 2.R3f5#
- 2.R8f5#
- 1...g6
- 2.Sf7#
- 1...dxc4!
- threat
- 1.R8xf3?
- threat
- 2.Sf7#
- 2.Rf5#
- 1...Qxf1
- 2.Sg6#
- 2.Sf7#
- 1...Rxc4
- 2.Sxc4#
- 1...Rf4
- 2.Qxf4#
- 1...Sd4
- 2.Sf7#
- 1...Qf2
- 2.Sg6#
- 2.Sf7#
- 1...Qg4
- 2.Sf7#
- 1...Qg5
- 2.Sf7#
- 1...Qg6
- 2.Sxg6#
- 1...Se7
- 2.Sf7#
- 1...Sd8
- 2.Rf5#
- 1...g6
- 2.Sf7#
- 1...dxc4!
- threat
- 1.Qc3+?
- 1...Qd4
- 2.Sg6#
- 1...Rd4
- 2.Rf5#
- 1...Sfd4
- 2.Sf7#
- 2.R1f5#
- 2.R8f5#
- 1...d4
- 2.Qc5#
- 1...Scd4!
- 1...Qd4
- 1.Qc5?
- threat
- 2.Sc4#
- 1...Rc4
- 2.Sxc4#
- 2.Rf5#
- 1...Rxa1!
- threat
- 1.Sa4+?
- Keys
- 1.Qa6!
- threat
- 2.Sc4#
- 1...Kd4
- 2.Sd1#
- 1...Scd4
- 2.Qd6#
- 1...Qd4
- 2.Sg6#
- 1...Rc4
- 2.Sxc4#
- 1...Rd4
- 2.Rf5#
- 1...Sfd4
- 2.Sf7#
- 1...d4
- 2.Qb5#
- threat
- 1.Qa6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 14
- Sets
- Q(a);N_GUARD::S(K)
- Q(a);N_GUARD,P_PINP(H)::S(K)
- Q(a);N_GUARD,XR(B)::S(K)
- Q(a);N_GUARD::S(K),XQ(a)
- R(c);XQ(F)::B(A)+S(C),DCHECK,XR(c)
- R(c);::R1(J)
- R(c);OGATE::QAB1(F),XR(c)
- S(b);::S(K)
- P(g);S_CUTQ(a)::S(K)
- Tries
- Try
- S(C);CHECK
- Vars
- Q(a);P_SPINQ(a)::S(K)
- R(c);P_SPINR(c)::R1(J)
- Refutation
- S(f);P_SPINS(f)
- Try
- B(D);
- Threat
- B(A)+S(C),DCHECK
- Vars
- R(c);XQ(F)::B(A)+S(C),DCHECK,XR(c)
- R(c);::R1(J)
- Refutation
- P(d);XQ(F)
- Try
- B(D);
- Threat
- B(A)+S(C),DCHECK
- Vars
- R(c);XQ(F)::B(A)+S(C),DCHECK,XR(c)
- R(c);::R1(J)
- Refutation
- P(d);XQ(F)
- Try
- R(B);XS(b)
- Threat
- DUALS(3)
- Vars
- R(c);XQ(F)::B(A)+S(C),DCHECK,XR(c)
- S(f);::S(K)
- Q(a);P_PINP(G)::S(K)
- Q(a);::S(K)
- Q(a);N_GUARD::S(K),XQ(a)
- R(c);OGATE::QAB1(F),XR(c)
- P(g);::S(K)
- Refutation
- P(d);XQ(F)
- Try
- R(J);XS(b)
- Threat
- DUALS(2)
- Vars
- R(c);XQ(F)::B(A)+S(C),DCHECK,XR(c)
- R(c);OGATE::QAB1(F),XR(c)
- S(f);::S(K)
- Q(a);P_PINP(G)::S(K)
- Q(a);::S(K)
- Q(a);N_GUARD::S(K),XQ(a)
- S(f);::R1(J)
- P(g);::S(K)
- Refutation
- P(d);XQ(F)
- Try
- Q(F);CHECK
- Vars
- Q(a);P_SPINQ(a)::S(K)
- R(c);P_SPINR(c)::R1(J)
- P(d);OGATEB,P_SPINP(d)::QAR2(F)
- Refutation
- S(f);P_SPINS(f)
- Try
- Q(F);P_PINP(d)
- Threat
- B(A)+S(C),DCHECK
- Refutation
- R(h);XB(A)
- Try
- Actual
- Q(F);
- Threat
- B(A)+S(C),DCHECK
- Vars
- K(e);S_FLIGHT::B(A)+S(C)
- S(f);OGATE,SBLOCK::QAB1(F)
- Q(a);N_GUARD,SBLOCK::S(K)
- R(c);::B(A)+S(C),DCHECK,XR(c)
- R(c);SBLOCK::R1(J)
- S(b);SBLOCK::S(K)
- P(d);OGATEB,SBLOCK::QAR(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).