MESON Chess Problem Database
Problem Display
PID: 9869 (1r4nb/2R1PP2/1p6/3kpQp1/1PN2p2/5N2/1K1p3q/3R2r1 w - - 0 1)
Mansfield, Comins
5th Prize, Die Schwalbe, 1960
#2
9 + 11
| 21 | Deutsche Schachblatter | 1962 |
| 3749 | FIDE Album (1959-1961) | 1966 |
| 3550 | Complete Mansfield/II | 1997 |
SOLUTION
- SOUND
- Sets
- 1...Qg3
- 2.Rxd2#
- 1...Qh1
- 2.Rxd2#
- 1...Qh3
- 2.Rxd2#
- 1...Qh4
- 2.Rxd2#
- 1...Qh5
- 2.Rxd2#
- 1...Qh6
- 2.Rxd2#
- 1...Qh7
- 2.Rxd2#
- 1...Rb7
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rd8
- 2.exd8Q#
- 2.exd8R#
- 1...Sf6
- 2.Qxe5#
- 1...b5
- 2.Rc5#
- 1...Qg3
- Tries
- 1.Sfxd2?
- threat
- 2.Qd7#
- 1...Qxd2+
- 2.Rxd2#
- 1...Kd4
- 2.Rd7#
- 2.Qe4#
- 2.Qd7#
- 1...Qh6
- 2.Sf1#
- 1...Rd8
- 2.exd8Q#
- 2.exd8R#
- 1...Sf6
- 2.Qxe5#
- 1...Qh3!
- threat
- 1.Sfxe5?
- threat
- 2.Rd7#
- 1...Bxe5+
- 2.Qxe5#
- 1...Kd4
- 2.Sf3#
- 2.Rd7#
- 2.Qd3#
- 1...Qh6
- 2.Rxd2#
- 1...Rd8
- 2.exd8Q#
- 2.exd8R#
- 1...Sf6
- 2.Sf3#
- 1...Rb7!
- threat
- 1.Sxg5?
- threat
- 2.Qd3#
- 2.Qe4#
- 2.Qd7#
- 1...Kd4
- 2.Qe4#
- 2.Qd7#
- 1...Qg3
- 2.Qe4#
- 2.Qd7#
- 1...Qh1
- 2.Rxd2#
- 2.Qd3#
- 2.Qd7#
- 1...Qe2
- 2.Qd7#
- 1...Qf2
- 2.Qe4#
- 2.Qd7#
- 1...Qg2
- 2.Qd3#
- 2.Qd7#
- 1...Qh3
- 2.Qe4#
- 1...Qh6
- 2.Rxd2#
- 2.Qd3#
- 2.Qe4#
- 1...Qh7
- 2.Rxd2#
- 2.Qd7#
- 1...Re1
- 2.Qd3#
- 2.Qd7#
- 1...Rg3
- 2.Qe4#
- 2.Qd7#
- 1...Rd8
- 2.Qd3#
- 2.Qe4#
- 2.exd8Q#
- 2.exd8R#
- 1...Sf6
- 2.Qd3#
- 2.Qxe5#
- 1...Rxg5!
- threat
- 1.Se3+?
- 1...Kd6
- 2.Qd7#
- 1...fxe3!
- 1...Kd6
- 1.Scxe5?
- threat
- 2.Rd7#
- 1...Bxe5+
- 2.Qxe5#
- 1...Kd6
- 2.Rd7#
- 2.Qd7#
- 1...Qh6
- 2.Rxd2#
- 1...Rd8
- 2.exd8Q#
- 2.exd8R#
- 1...Sf6
- 2.Sc4#
- 1...Rb7!
- threat
- 1.Sxb6+?
- 1...Kd6
- 2.Qd7#
- 1...Rxb6!
- 1...Kd6
- 1.e8Q?
- threat
- 2.Qd3#
- 2.Qb5#
- 2.Qc6#
- 2.Qed7#
- 2.Qee6#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rxd1
- 2.Qd3#
- 2.Qb5#
- 2.Qc6#
- 2.Qed7#
- 2.Qee6#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rb7
- 2.Qd3#
- 2.Qb5#
- 2.Qc6#
- 2.Qed7#
- 2.Qee6#
- 2.Qd8#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qg3
- 2.Rxd2#
- 2.Qd3#
- 2.Qb5#
- 2.Qc6#
- 2.Qed7#
- 2.Qee6#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qh1
- 2.Rxd2#
- 2.Qd3#
- 2.Qb5#
- 2.Qc6#
- 2.Qed7#
- 2.Qee6#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qe2
- 2.Qb5#
- 2.Qc6#
- 2.Qed7#
- 2.Qee6#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qg2
- 2.Qd3#
- 2.Qb5#
- 2.Qc6#
- 2.Qed7#
- 2.Qee6#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qh3
- 2.Rxd2#
- 2.Qd3#
- 2.Qb5#
- 2.Qc6#
- 2.Qed7#
- 2.Qee6#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qh4
- 2.Rxd2#
- 2.Qd3#
- 2.Qb5#
- 2.Qc6#
- 2.Qed7#
- 2.Qee6#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qh5
- 2.Rxd2#
- 2.Qd3#
- 2.Qb5#
- 2.Qc6#
- 2.Qed7#
- 2.Qee6#
- 1...Qh6
- 2.Rxd2#
- 2.Qd3#
- 2.Qb5#
- 1...Qh7
- 2.Rxd2#
- 2.Qb5#
- 2.Qc6#
- 2.Qed7#
- 2.Qee6#
- 1...Re1
- 2.Qd3#
- 2.Qb5#
- 2.Qc6#
- 2.Qed7#
- 2.Qee6#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rf1
- 2.Qd3#
- 2.Qb5#
- 2.Qc6#
- 2.Qed7#
- 2.Qee6#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rh1
- 2.Qd3#
- 2.Qb5#
- 2.Qc6#
- 2.Qed7#
- 2.Qee6#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rg2
- 2.Qd3#
- 2.Qb5#
- 2.Qc6#
- 2.Qed7#
- 2.Qee6#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rg3
- 2.Qd3#
- 2.Qb5#
- 2.Qc6#
- 2.Qed7#
- 2.Qee6#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rg4
- 2.Qd3#
- 2.Qb5#
- 2.Qc6#
- 2.Qed7#
- 2.Qee6#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Ra8
- 2.Qd3#
- 2.Qb5#
- 2.Qc6#
- 2.Qed7#
- 2.Qee6#
- 2.Qxa8#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rc8
- 2.Qd3#
- 2.Qb5#
- 2.Qc6#
- 2.Qed7#
- 2.Qee6#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rd8
- 2.Qd3#
- 2.Qb5#
- 2.Qc6#
- 2.Qee6#
- 2.Qxd8#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Bf6
- 2.Qd3#
- 2.Qb5#
- 2.Qc6#
- 2.Qed7#
- 2.Qee6#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Bg7
- 2.Qd3#
- 2.Qb5#
- 2.Qc6#
- 2.Qed7#
- 2.Qee6#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Sf6
- 2.Qd3#
- 2.Qb5#
- 2.Qc6#
- 2.Qfxe5#
- 2.Qexe5#
- 2.Qee6#
- 1...Sh6
- 2.Qd3#
- 2.Qb5#
- 2.Qc6#
- 2.Qed7#
- 2.Qee6#
- 1...Se7
- 2.Qb5#
- 2.Qed7#
- 1...g4
- 2.Qd3#
- 2.Qb5#
- 2.Qc6#
- 2.Qed7#
- 2.Qee6#
- 2.fxg8Q#
- 2.fxg8B#
- 1...b5
- 2.Rc5#
- 2.Qd3#
- 2.Qc6#
- 2.Qed7#
- 2.Qee6#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rxe8!
- threat
- 1.Sfxd2?
- Keys
- 1.Scxd2!
- threat
- 2.Qd7#
- 1...Qxd2+
- 2.Rxd2#
- 1...Kd6
- 2.Qd7#
- 1...Qh3
- 2.Sf1#
- 1...Qh6
- 2.Sf1#
- 1...Rd8
- 2.exd8Q#
- 2.exd8R#
- 1...Sf6
- 2.Qxe5#
- threat
- 1.Scxd2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 6
- Sets
- Q(c);N_GUARD::R(A),XP(b)
- R(i);N_GUARD::PXS(j)=Q
- R(i);OGATE::PXR(i)=Q
- S(j);S_CUTB(k)::QAR1(F),XP(f)
- P(h);N_GUARD::R1(G)
- Tries
- Try
- S(C);P_PINP(f),P_SPINS(C),XP(b)
- Threat
- QAR2(F)
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XS(C)::R(A),XQ(c)
- Q(c);N_PINS(C)::R(A)+S(C)
- R(i);OGATE::PXR(i)=Q
- S(j);S_CUTB(k)::QAR1(F),XP(f)
- Refutation
- Q(c);N_PINS(C)
- Try
- S(C);P_SPINS(C),XP(f)
- Threat
- R(G)
- Vars
- B(k);CHECK,OGATE,P_SPINB(k),XS(C)::QAR1(F),XB(k)
- Q(c);N_GUARD::R(A),XP(b)
- R(i);OGATE::PXR(i)=Q
- S(j);N_PINS(C)::QAR(F)+S(C)
- Refutation
- R(i);
- Try
- S(C);XP(g)
- Threat
- DUALS(3)
- Vars
- Q(c);::QAR2(F)
- Q(c);::QAB1(F)
- Refutation
- R(a);XS(C)
- Try
- S(E);CHECK
- Vars
- K(e);P-FLIGHT::QAR1(F)
- Refutation
- P(d);XS(E)
- Try
- S(E);P_SPINS(E),XP(f)
- Threat
- R(G)
- Vars
- B(k);CHECK,OGATE,P_SPINB(k),XS(E)::QAR1(F),XB(k)
- Q(c);N_GUARD::R(A),XP(b)
- R(i);OGATE::PXR(i)=Q
- S(j);N_PINS(E)::QAR(F)+S(E)
- Refutation
- R(i);
- Try
- S(E);CHECK,XP(h)
- Vars
- K(e);P-FLIGHT::QAR1(F)
- Refutation
- R(i);P_PINP(D),XS(E)
- Try
- P(H);
- Threat
- DUALS(7)
- Refutation
- R(i);XQ(H)
- Try
- Actual
- S(E);P_PINP(f),P_SPINS(E),XP(b)
- Threat
- QAR2(F)
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XS(E)::R(A),XQ(c)
- K(e);N_SPINP(f),P-FLIGHT::QAR1(F)
- Q(c);N_PINS(E)::R(A)+S(E)
- R(i);OGATE::PXR(i)=Q
- S(j);S_CUTB(k)::QAR1(F),XP(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).