MESON Chess Problem Database
Problem Display
PID: 6710 (5K2/3p4/3n1p2/2pQ4/2NpR1Rp/5k2/3PNr1n/4br1b w - - 0 1)
Blake, Percy Francis
Comm., BCF 013. Ty., 1933-1934
#2
7 + 12
| 56 | The Problemist | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rg1
- 2.Sxg1#
- 1...Rxe2
- 2.Ref4#
- 1...Rg2
- 2.Rgf4#
- 1...Bxd2
- 2.Sxd2#
- 1...Bg2
- 2.Rgf4#
- 1...Sxg4
- 2.Re3#
- 1...Sxc4
- 2.Qf5#
- 1...Sxe4
- 2.Qxe4#
- 1...Sb5
- 2.Qf5#
- 1...Sf5
- 2.Qxf5#
- 1...Sb7
- 2.Qf5#
- 1...Sf7
- 2.Qf5#
- 1...Sc8
- 2.Qf5#
- 1...Se8
- 2.Qf5#
- 1...d3
- 2.Qxd3#
- 1...h3
- 2.Rg3#
- 1...f5
- 2.Se5#
- 1...Rg1
- Tries
- 1.Kg8?
- 1...Rxe2
- 2.Ref4#
- 1...Bxd2
- 2.Sxd2#
- 1...Sxg4
- 2.Re3#
- 1...Sxc4
- 2.Qf5#
- 1...Sxe4
- 2.Qxe4#
- 1...Rg1
- 2.Sxg1#
- 1...Bg2
- 2.Rgf4#
- 1...Sb5
- 2.Qf5#
- 1...Sf5
- 2.Qxf5#
- 1...Sb7
- 2.Qf5#
- 1...Sf7
- 2.Qf5#
- 1...Sc8
- 2.Qf5#
- 1...Se8
- 2.Qf5#
- 1...d3
- 2.Qxd3#
- 1...h3
- 2.Rg3#
- 1...f5
- 2.Se5#
- 1...Rg2!
- 1...Rxe2
- 1.Sc1?
- threat
- 2.Ref4#
- 1...Sxe4
- 2.Qxe4#
- 2.Qf5#
- 1...Sxg4!
- threat
- 1.Sc3?
- threat
- 2.Ref4#
- 1...Sxe4
- 2.Qxe4#
- 2.Qf5#
- 1...dxc3
- 2.Qd3#
- 1...Sxg4!
- threat
- 1.Sxd6?
- threat
- 2.Qf5#
- 1...Sxg4
- 2.Re3#
- 2.Re5#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 1...f5
- 2.Qxf5#
- 1...Bxd2!
- threat
- 1.Rxd4+?
- 1...Se4
- 2.Qxe4#
- 1...Kxe2!
- 1...Se4
- 1.Re5+?
- 1...Se4
- 2.Qxe4#
- 1...Kxg4!
- 1...Se4
- 1.Re6+?
- 1...Se4
- 2.Qxe4#
- 1...Kxg4!
- 1...Se4
- 1.Re7+?
- 1...Se4
- 2.Qxe4#
- 1...Kxg4!
- 1...Se4
- 1.Re8+?
- 1...Se4
- 2.Qxe4#
- 1...Kxg4!
- 1...Se4
- 1.Rxh4?
- threat
- 2.Re3#
- 1...Kg2
- 2.Reg4#
- 1...Sxe4
- 2.Qxe4#
- 1...Rg2
- 2.Rhf4#
- 1...Rxe2!
- threat
- 1.Qe6?
- threat
- 2.Ref4#
- 1...Bxd2
- 2.Sxd2#
- 1...Sxg4
- 2.Qxg4#
- 1...Sxe4
- 2.Qxe4#
- 1...dxe6!
- threat
- 1.Qg8?
- threat
- 2.Rgf4#
- 1...Bxd2
- 2.Sxd2#
- 1...Sxg4
- 2.Qxg4#
- 1...Sxe4!
- threat
- 1.Qe5?
- threat
- 2.Ref4#
- 2.Qf4#
- 1...Bxd2
- 2.Sxd2#
- 1...Sxe4
- 2.Qxe4#
- 1...fxe5
- 2.Sxe5#
- 1...Sxg4!
- threat
- 1.Qg5?
- threat
- 2.Rgf4#
- 2.Qf4#
- 1...Bxd2
- 2.Sxd2#
- 1...Sxg4
- 2.Qxg4#
- 1...fxg5
- 2.Se5#
- 1...Sxe4!
- threat
- 1.Qxd6?
- threat
- 2.Qf4#
- 2.Qxf6#
- 1...Bxd2
- 2.Sxd2#
- 1...f5
- 2.Se5#
- 2.Qf4#
- 1...Sxg4!
- threat
- 1.Kg8?
- Keys
- 1.Qh5!
- 1...Rxe2
- 2.Ref4#
- 1...Bxd2
- 2.Sxd2#
- 1...Sxg4
- 2.Qxg4#
- 1...Sxc4
- 2.Qf5#
- 1...Sxe4
- 2.Rg3#
- 1...Rg2
- 2.Rgf4#
- 1...f5
- 2.Se5#
- 1...Rg1
- 2.Sxg1#
- 1...Bg2
- 2.Rgf4#
- 1...Sb5
- 2.Qf5#
- 1...Sf5
- 2.Qxf5#
- 1...Sb7
- 2.Qf5#
- 1...Sf7
- 2.Qf5#
- 1...Sc8
- 2.Qf5#
- 1...Se8
- 2.Qf5#
- 1...d3
- 2.Re3#
- 1...h3
- 2.Qxh3#
- 1...Rxe2
- 1.Qh5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 4
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(b);N_GUARD::S(B),XR(b)
- R(d);SBLOCK,XS(B)::QAB(F)+R(D),DCHECK
- R(d);SBLOCK::R1(E)
- B(a);XP(A)::S(C),XB(a)
- B(c);SBLOCK::R1(E)
- S(e);SBLOCK,XR(E)::QAB(F)+R(D),DCHECK
- S(j);N_GUARD,XS(C)::QAR2(F)
- S(j);OGATE,P_SPINS(j),XR(D)::QAB1(F),XS(j)
- S(j);N_GUARD::QAR2(F)
- S(j);N_GUARD::QAR2(F),XS(j)
- P(g);OGATE::QAR2(F),XP(g)
- P(h);N_GUARD::R1(E)
- P(k);N_GUARD::S(C)
- Tries
- Try
- K(G);P-FLIGHT
- Vars
- R(d);SBLOCK,XS(B)::QAB(F)+R(D),DCHECK
- B(a);XP(A)::S(C),XB(a)
- S(e);SBLOCK,XR(E)::QAB(F)+R(D),DCHECK
- S(j);N_GUARD,XS(C)::QAR2(F)
- S(j);OGATE,P_SPINS(j),XR(D)::QAB1(F),XS(j)
- R(b);N_GUARD,P_PINR(E)::S(B),XR(b)
- B(c);SBLOCK::R1(E)
- S(j);N_GUARD::QAR2(F)
- S(j);N_GUARD::QAR2(F),XS(j)
- P(g);OGATE::QAR2(F),XP(g)
- P(h);N_GUARD::R1(E)
- P(k);N_GUARD::S(C)
- Refutation
- R(d);P_PINR(E)
- Try
- S(B);
- Threat
- QAB(F)+R(D),DCHECK
- Refutation
- S(e);XR(E)
- Try
- S(B);
- Threat
- QAB(F)+R(D),DCHECK
- Vars
- P(g);OGATE,XS(B)::QAR2(F)
- Refutation
- S(e);XR(E)
- Try
- S(C);XS(j)
- Threat
- QAR2(F)
- Vars
- P(k);::QAR2(F),XP(k)
- Refutation
- B(a);XP(A)
- Try
- R(D);CHECK,XP(g)
- Vars
- S(j);N_GUARD,P_SPINS(j)::QAB1(F),XS(j)
- Refutation
- K(f);S_FLIGHT,XS(B)
- Try
- R(D);CHECK
- Vars
- S(j);N_GUARD,P_SPINS(j)::QAB1(F),XS(j)
- Refutation
- K(f);S_FLIGHT,XR(E)
- Try
- R(D);CHECK
- Vars
- S(j);N_GUARD,P_SPINS(j)::QAB1(F),XS(j)
- Refutation
- K(f);S_FLIGHT,XR(E)
- Try
- R(D);CHECK
- Vars
- S(j);N_GUARD,P_SPINS(j)::QAB1(F),XS(j)
- Refutation
- K(f);S_FLIGHT,XR(E)
- Try
- R(D);CHECK
- Vars
- S(j);N_GUARD,P_SPINS(j)::QAB1(F),XS(j)
- Refutation
- K(f);S_FLIGHT,XR(E)
- Try
- R(E);XP(h)
- Threat
- QAB(F)+R(D),DCHECK
- Vars
- K(f);S_FLIGHT::QAB(F)+R(D),DCHECK
- S(j);OGATE,P_SPINS(j),XR(D)::QAB1(F),XS(j)
- R(d);SBLOCK::R1(E)
- Refutation
- R(d);XS(B)
- Try
- Q(F);
- Threat
- R1(D)
- Vars
- B(a);XP(A)::S(C),XB(a)
- S(e);OGATE,XR(E)::QAB1(F),XS(e)
- S(j);OGATE,XR(D)::QAB1(F),XS(j)
- Refutation
- P(l);XQ(F)
- Try
- Q(F);
- Threat
- R1(E)
- Vars
- B(a);XP(A)::S(C),XB(a)
- S(e);OGATE,XR(E)::QAB1(F),XS(e)
- Refutation
- S(j);XR(D)
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- B(a);XP(A)::S(C),XB(a)
- S(j);OGATE,XR(D)::QAB1(F),XS(j)
- P(k);XQ(F)::S(C),XP(k)
- Refutation
- S(e);XR(E)
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- B(a);XP(A)::S(C),XB(a)
- S(e);OGATE,XR(E)::QAB1(F),XS(e)
- P(k);N_GUARD,XQ(F)::S(C)
- Refutation
- S(j);XR(D)
- Try
- Q(F);XS(j)
- Threat
- DUALS(2)
- Vars
- B(a);XP(A)::S(C),XB(a)
- Refutation
- S(e);XR(E)
- Try
- Actual
- Q(F);
- Vars
- R(d);SBLOCK,XS(B)::R1(D)
- B(a);XP(A)::S(C),XB(a)
- S(e);OGATE,P_SPINS(e),XR(E)::QAB1(F),XS(e)
- S(j);N_GUARD,XS(C)::QAR2(F)
- S(j);SBLOCK,XR(D)::QAB(F)+R(E),DCHECK
- R(d);SBLOCK::QAB(F)+R(E),DCHECK
- P(k);N_GUARD::S(C)
- R(b);N_GUARD::S(B),XR(b)
- B(c);SBLOCK::QAB(F)+R(E),DCHECK
- S(j);N_GUARD::QAR2(F)
- S(j);N_GUARD::QAR2(F),XS(j)
- P(g);N_GUARD::R1(D)
- P(h);OGATE::QAR2(F),XP(h)
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).