MESON Chess Problem Database
Problem Display
PID: 11940 (5K2/4p3/8/NRNkBR2/Q2q4/8/8/n2r4 w - - 0 1)
Barnes, Barry Peter
2nd Prize, Problemas, 1973
#2
7 + 5
| 5395 | Schach fur Nussknacker | 1994 |
| 4199 | Barnes about Chess Problems | 2001 |
| 56 | The Problemist | 2012 |
SOLUTION
- SOUND
- Sets
- 1...Qg1
- 2.Qc4#
- 2.Qe4#
- 1...Qb2
- 2.Qc4#
- 2.Qe4#
- 1...Qf2
- 2.Qc4#
- 2.Qe4#
- 1...Qc3
- 2.Qe4#
- 1...Qe3
- 2.Qc4#
- 1...Qxc5
- 2.Qc4#
- 1...Qxe5
- 2.Qxd1#
- 1...Qd2
- 2.Qc4#
- 2.Qe4#
- 1...Qc4
- 2.Qxc4#
- 1...Qe4
- 2.Qxe4#
- 1...Rb1
- 2.Qxd4#
- 1...Rc1
- 2.Qxd4#
- 1...Re1
- 2.Qxd4#
- 1...Rf1
- 2.Qxd4#
- 1...Rg1
- 2.Qxd4#
- 1...Rh1
- 2.Qxd4#
- 1...Qg1
- Tries
- 1.Bh2+?
- 1...Qe5
- 2.Qxd1#
- 1...e5!
- 1...Qe5
- 1.Bg3+?
- 1...Qe5
- 2.Qxd1#
- 1...e5!
- 1...Qe5
- 1.Bf4+?
- 1...Qe5
- 2.Qxd1#
- 1...e5!
- 1...Qe5
- 1.Bc7+?
- 1...Qe5
- 2.Rxe5#
- 2.Qxd1#
- 2.Qc4#
- 2.Qe4#
- 1...e5!
- 1...Qe5
- 1.Bb8+?
- 1...Qe5
- 2.Rxe5#
- 2.Qxd1#
- 2.Qc4#
- 2.Qe4#
- 1...e5!
- 1...Qe5
- 1.Rb4?
- threat
- 2.Qc6#
- 1...Kxc5
- 2.Rb5#
- 2.Qb5#
- 1...Qxc5!
- threat
- 1.Qb3+?
- 1...Qc4
- 2.Qxc4#
- 1...Sxb3!
- 1...Qc4
- 1.Qa2+?
- 1...Qc4
- 2.Qxc4#
- 1...Sb3!
- 1...Qc4
- 1.Bh2+?
- Keys
- 1.Kxe7!
- threat
- 2.Bxd4#
- 1...Qxc5+
- 2.Bd6#
- 1...Qxe5+
- 2.Se6#
- 1...Qh4+
- 2.Bf6#
- 1...Qxa4
- 2.Bxa1#
- 2.Bb2#
- 2.Bc3#
- 2.Bf6#
- 2.Bg7#
- 2.Bh8#
- 1...Qg1
- 2.Bxa1#
- 2.Bb2#
- 2.Bh2#
- 2.Bc3#
- 2.Bg3#
- 2.Bd4#
- 2.Bf4#
- 2.Bd6#
- 2.Bf6#
- 2.Bc7#
- 2.Bg7#
- 2.Bb8#
- 2.Bh8#
- 2.Qc4#
- 2.Qe4#
- 1...Qb2
- 2.Scb3#
- 2.Bxb2#
- 2.Bc3#
- 2.Bd4#
- 2.Qc4#
- 2.Qe4#
- 1...Qf2
- 2.Bf4#
- 2.Qc4#
- 2.Qe4#
- 1...Qc3
- 2.Bxc3#
- 2.Bd4#
- 2.Qe4#
- 1...Qe3
- 2.Qc4#
- 1...Qd2
- 2.Scb3#
- 2.Sd3#
- 2.Se4#
- 2.Sa6#
- 2.Se6#
- 2.Scb7#
- 2.Sd7#
- 2.Bxa1#
- 2.Bb2#
- 2.Bh2#
- 2.Bc3#
- 2.Bg3#
- 2.Bd4#
- 2.Bf4#
- 2.Bd6#
- 2.Bf6#
- 2.Bc7#
- 2.Bg7#
- 2.Bb8#
- 2.Bh8#
- 2.Qc4#
- 2.Qe4#
- 1...Qd3
- 2.Sxd3#
- 1...Qb4
- 2.Bxa1#
- 2.Bb2#
- 2.Bc3#
- 2.Bf6#
- 2.Bg7#
- 2.Bh8#
- 1...Qc4
- 2.Bxa1#
- 2.Bb2#
- 2.Bc3#
- 2.Bf6#
- 2.Bg7#
- 2.Bh8#
- 2.Qxc4#
- 1...Qe4
- 2.Scb3#
- 2.Sd3#
- 2.Sxe4#
- 2.Sa6#
- 2.Se6#
- 2.Scb7#
- 2.Sd7#
- 2.Qxe4#
- 1...Qf4
- 2.Scb3#
- 2.Sd3#
- 2.Se4#
- 2.Sa6#
- 2.Se6#
- 2.Scb7#
- 2.Sd7#
- 2.Bxf4#
- 1...Qg4
- 2.Scb3#
- 2.Sd3#
- 2.Se4#
- 2.Sa6#
- 2.Se6#
- 2.Scb7#
- 2.Sd7#
- 1...Re1
- 2.Qxd4#
- 1...Rf1
- 2.Qxd4#
- threat
- 1.Kxe7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 7
- Sets
- Q(c);OGATE::QAB1(A)
- Q(c);N_GUARD::QAB1(A)
- Q(c);N_GUARD,P_SPINQ(c),XS(D)::QAB1(A)
- Q(c);OGATEB,P_SPINQ(c),XB(E)::QAR(A),XR(b)
- Q(c);N_GUARD::QAB1(A),XQ(c)
- Q(c);OGATE::QAB1(A),XQ(c)
- R(b);N_GUARD::QAR1(A),XQ(c)
- R(b);N_GUARD,P_PINR(F)::QAR1(A),XQ(c)
- Tries
- Try
- B(E);CHECK
- Vars
- Q(c);P_SPINQ(c),S_CUTP(e)::QAR(A),XR(b)
- Refutation
- P(e);P_SPINP(e)
- Try
- B(E);CHECK
- Vars
- Q(c);P_SPINQ(c),S_CUTP(e)::QAR(A),XR(b)
- Refutation
- P(e);P_SPINP(e)
- Try
- B(E);CHECK
- Vars
- Q(c);P_SPINQ(c),S_CUTP(e)::QAR(A),XR(b)
- Refutation
- P(e);P_SPINP(e)
- Try
- B(E);CHECK
- Refutation
- P(e);P_SPINP(e)
- Try
- B(E);CHECK
- Refutation
- P(e);P_SPINP(e)
- Try
- R(C);
- Threat
- QAB1(A)
- Refutation
- Q(c);XS(D)
- Try
- Q(A);CHECK
- Vars
- Q(c);N_GUARD,P_SPINQ(c)::QAB1(A),XQ(c)
- Refutation
- S(a);XQ(A)
- Try
- Q(A);CHECK
- Vars
- Q(c);N_GUARD,P_SPINQ(c)::QAB1(A),XQ(c)
- Refutation
- S(a);P_SPINS(a)
- Try
- Actual
- K(G);S_FLIGHT,XP(e)
- Threat
- R(F)+B(E),XQ(c)
- Vars
- Q(c);CHECK,N_GUARD,P_SPINQ(c),XS(D)::R(F)+B(E)
- Q(c);CHECK,N_GUARD,P_SPINQ(c),XB(E)::R(C)+S(D)
- Q(c);CHECK,N_GUARD::R(F)+B(E)
- Q(c);N_GUARD,P_PINB(E)::QAB1(A)
- Q(c);N_GUARD::R(C)+S(D),XQ(c)
- R(b);N_GUARD,P_PINB(E)::QAR1(A),XQ(c)
- R(b);N_GUARD::QAR1(A),XQ(c)
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).