MESON Chess Problem Database
Problem Display
PID: 201036 (5q2/4P3/r2pQ3/3n1ppP/b4kB1/r5NK/1BN2Pn1/8 w - - 0 1)
Barron, Philip
The Observer, 1949
(First published on Sun May 8 1949)
#2
9 + 10
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qh6
- 2.Qxf5#
- 1...Qxe7
- 2.Qxf5#
- 1...Qg7
- 2.Qxf5#
- 1...Qa8
- 2.Qxf5#
- 1...Qb8
- 2.Qxf5#
- 1...Qd8
- 2.Qxf5#
- 1...Qe8
- 2.Qxf5#
- 1...Qg8
- 2.Qxf5#
- 1...Qh8
- 2.Qxf5#
- 1...Ra1
- 2.Se2#
- 1...Ra2
- 2.Se2#
- 1...Rxg3+
- 2.fxg3#
- 1...Ra5
- 2.Qxd6#
- 1...Ra7
- 2.Qxd6#
- 1...Ra8
- 2.Qxd6#
- 1...Bb3
- 2.Se2#
- 1...Bc6
- 2.Qxd6#
- 1...Sge3
- 2.Se2#
- 1...Sde3
- 2.Se2#
- 1...Sb4
- 2.Qc4#
- 1...Sb6
- 2.Qxd6#
- 1...Sf6
- 2.Qxf5#
- 1...Sc7
- 2.Qc4#
- 1...Sxe7
- 2.Qc4#
- 1...fxg4+
- 2.Qxg4#
- 1...Qh6
- Tries
- 1.Se3?
- threat
- 2.Sxg2#
- 2.Sxd5#
- 2.Se2#
- 1...fxg4+
- 2.Qxg4#
- 1...Sgxe3
- 2.Se2#
- 1...Sdxe3
- 2.Se2#
- 1...Sxe7
- 2.Sxg2#
- 2.Se2#
- 2.Qc4#
- 1...Qa8
- 2.Sxg2#
- 2.Se2#
- 2.Qxf5#
- 1...Rd3
- 2.Sxg2#
- 2.Se2#
- 1...Ra5
- 2.Sxg2#
- 2.Se2#
- 2.Qxd6#
- 1...Bd1
- 2.Sxg2#
- 2.Sxd5#
- 1...Bb3
- 2.Sxg2#
- 2.Se2#
- 1...Bb5
- 2.Sxg2#
- 2.Sxd5#
- 1...Bc6
- 2.Sxg2#
- 2.Se2#
- 2.Qxd6#
- 1...Se1
- 2.Sxd5#
- 2.Se2#
- 1...Sh4
- 2.Sxd5#
- 2.Se2#
- 1...Sc3
- 2.Sxg2#
- 1...Sb4
- 2.Sxg2#
- 2.Se2#
- 2.Qc4#
- 1...Sb6
- 2.Sxg2#
- 2.Se2#
- 2.Qxd6#
- 1...Sf6
- 2.Sxg2#
- 2.Se2#
- 2.Qxf5#
- 1...Sc7
- 2.Sxg2#
- 2.Se2#
- 2.Qc4#
- 1...Rxe3!
- threat
- 1.Bc1+?
- 1...Sge3
- 2.Se2#
- 1...Sde3
- 2.Se2#
- 1...Re3!
- 1...Sge3
- 1.exf8Q?
- threat
- 2.Qexf5#
- 2.Qe4#
- 2.Qfxf5#
- 1...Rxg3+
- 2.fxg3#
- 1...Re3
- 2.Qexf5#
- 2.Qfxf5#
- 1...Bd7
- 2.Qe4#
- 2.Qfxf5#
- 1...Sge3
- 2.Se2#
- 2.Qe4#
- 1...Sh4
- 2.Qe4#
- 1...Sc3
- 2.Qexf5#
- 2.Qfxf5#
- 1...Sde3
- 2.Se2#
- 2.Qe4#
- 1...Sf6
- 2.Qxf5#
- 1...Se7
- 2.Qc4#
- 2.Qe4#
- 1...Bxc2!
- threat
- 1.exf8S?
- threat
- 2.Sg6#
- 2.Qxf5#
- 1...Rxg3+
- 2.fxg3#
- 1...fxg4+
- 2.Qxg4#
- 1...Bxc2
- 2.Sg6#
- 1...Bd7
- 2.Sg6#
- 1...Be8
- 2.Qxf5#
- 1...Sge3
- 2.Se2#
- 2.Sg6#
- 1...Sde3
- 2.Se2#
- 2.Sg6#
- 1...Se7
- 2.Qc4#
- 1...Sh4!
- threat
- 1.exf8R?
- threat
- 2.Rxf5#
- 2.Qxf5#
- 2.Qe4#
- 1...Rxg3+
- 2.fxg3#
- 1...Re3
- 2.Rxf5#
- 2.Qxf5#
- 1...Bd7
- 2.Rxf5#
- 2.Qe4#
- 1...Sge3
- 2.Se2#
- 2.Qe4#
- 1...Sh4
- 2.Qe4#
- 1...Sc3
- 2.Rxf5#
- 2.Qxf5#
- 1...Sde3
- 2.Se2#
- 2.Qe4#
- 1...Sf6
- 2.Qxf5#
- 1...Se7
- 2.Qc4#
- 2.Qe4#
- 1...Bxc2!
- threat
- 1.Se3?
- Keys
- 1.Sb4!
- threat
- 2.Sxd5#
- 1...Rxg3+
- 2.fxg3#
- 1...fxg4+
- 2.Qxg4#
- 1...Sxb4
- 2.Qc4#
- 1...Sxe7
- 2.Qc4#
- 1...Qa8
- 2.Qxf5#
- 1...Rd3
- 2.Sxd3#
- 1...Ra5
- 2.Qxd6#
- 1...Bb3
- 2.Se2#
- 2.Sd3#
- 1...Bc6
- 2.Qxd6#
- 1...Sge3
- 2.Se2#
- 1...Sc3
- 2.Sd3#
- 1...Sde3
- 2.Se2#
- 1...Sb6
- 2.Qxd6#
- 1...Sf6
- 2.Qxf5#
- 1...Sc7
- 2.Qc4#
- threat
- 1.Sb4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 13
- Sets
- Q(j);N_GUARD,P_PINP(G)::QAR1(H),XP(f)
- Q(j);N_GUARD,XP(I)::QAR1(H),XP(f)
- Q(j);N_GUARD::QAR1(H),XP(f)
- R(b);N_PINS(D)::S(D)
- R(b);CHECK,OGATE,XS(D)::P(C),XR(b)
- R(h);N_GUARD::QAB(H),XP(i)
- B(c);N_PINS(D)::S(D)
- B(c);S_CUTR(h)::QAB(H),XP(i)
- S(a);N_PINS(D)::S(D)
- S(e);N_PINS(D)::S(D)
- S(e);OGATE::QAR(H)
- S(e);S_CUTR(h)::QAB(H),XP(i)
- S(e);S_CUTQ(j)::QAR1(H),XP(f)
- S(e);OGATE,XP(I)::QAR(H)
- P(f);CHECK,OGATE,XB(F)::QAR1(H),XP(f)
- Tries
- Try
- S(B);N_SPINS(D)
- Threat
- DUALS(3)
- Vars
- P(f);CHECK,OGATE,XB(F)::QAR1(H),XP(f)
- S(a);XS(B)::S(D)
- S(e);XS(B)::S(D)
- S(e);::S(B),XS(a)
- Refutation
- R(b);P_PINS(D),XS(B)
- Try
- B(A);CHECK
- Vars
- S(a);N_PINS(D),P_SPINS(a)::S(D)
- S(e);N_PINS(D),P_SPINS(e)::S(D)
- Refutation
- R(b);P_SPINR(b)
- Try
- P(I);P_PINP(f),XQ(j)
- Threat
- DUALS(3)
- Vars
- R(b);CHECK,OGATE,XS(D)::P(C),XR(b)
- S(a);::QAR1(H)
- S(e);N_SPINP(f)::QAR1(H),XP(f)
- Refutation
- B(c);XS(B)
- Try
- P(I);XQ(j)
- Threat
- DUALS(2)
- Vars
- R(b);CHECK,OGATE,XS(D)::P(C),XR(b)
- P(f);CHECK,OGATE,XB(F)::QAR1(H),XP(f)
- B(c);XS(B)::S(I)
- B(c);::S(I)
- B(c);::QAR1(H),XP(f)
- S(e);OGATE::QAR(H)
- Refutation
- S(a);
- Try
- P(I);P_PINP(f),XQ(j)
- Threat
- DUALS(3)
- Vars
- R(b);CHECK,OGATE,XS(D)::P(C),XR(b)
- S(a);::QAR1(H)
- S(e);N_SPINP(f)::QAR1(H),XP(f)
- Refutation
- B(c);XS(B)
- Try
- Actual
- S(B);
- Threat
- S(B),XS(e)
- Vars
- R(b);CHECK,OGATE,XS(D)::P(C),XR(b)
- P(f);CHECK,OGATE,XB(F)::QAR1(H),XP(f)
- S(e);OGATE,XS(B)::QAR(H)
- S(e);OGATE,XP(I)::QAR(H)
- Q(j);N_GUARD::QAR1(H),XP(f)
- R(b);N_GUARD::S(B),XR(b)
- R(h);N_GUARD::QAB(H),XP(i)
- B(c);S_CUTR(h)::QAB(H),XP(i)
- S(a);N_PINS(D)::S(D)
- S(e);N_PINS(D),S_CUTR(b)::S(B)
- S(e);N_PINS(D)::S(D)
- S(e);S_CUTR(h)::QAB(H),XP(i)
- S(e);S_CUTQ(j)::QAR1(H),XP(f)
- S(e);OGATE::QAR(H)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
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