MESON Chess Problem Database
Problem Display
PID: 176067 (3q4/1P4N1/r3R3/4BP2/2P1k1pp/3N4/P3PP2/1Q1K4 w - - 0 1)
Prater, Alfred
Schach-Echo, 1936
#2
12 + 5
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qa5
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Sc5#
- 1...Qg5
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Sc5#
- 1...Qb6
- 2.Sb2#
- 2.Sb4#
- 2.Sc5#
- 1...Qf6
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Sc5#
- 1...Qc7
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Sc5#
- 1...Qe7
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Sc5#
- 1...Qxd3+
- 2.Qxd3#
- 1...Qa8
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Sc5#
- 1...Qb8
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Sc5#
- 1...Qc8
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Sc5#
- 1...Qe8
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Sc5#
- 1...Qf8
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Sc5#
- 1...Qg8
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Sc5#
- 1...Qh8
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Sc5#
- 1...Rxa2
- 2.Ba1#
- 2.Bb2#
- 2.Bc3#
- 2.Bf6#
- 1...Ra3
- 2.Ba1#
- 2.Bb2#
- 2.Bc3#
- 2.Bf6#
- 1...Ra4
- 2.Ba1#
- 2.Bb2#
- 2.Bc3#
- 2.Bf6#
- 1...Ra7
- 2.Ba1#
- 2.Bb2#
- 2.Bc3#
- 2.Bf6#
- 1...Ra8
- 2.Ba1#
- 2.Bb2#
- 2.Bc3#
- 2.Bf6#
- 1...Qa5
- Tries
- 1.Kc1?
- threat
- 2.Sc5#
- 1...Qg5+
- 2.Sf4#
- 1...Qxd3
- 2.Qxd3#
- 1...Rxe6!
- threat
- 1.Ke1?
- threat
- 2.Sc5#
- 1...Qa5+
- 2.Sb4#
- 1...Qxd3
- 2.Qxd3#
- 1...Rxe6!
- threat
- 1.Kc2?
- threat
- 2.Sc5#
- 2.Qh1#
- 1...Rxa2+
- 2.Bb2#
- 1...Rxe6
- 2.Qh1#
- 1...Qa5
- 2.Qh1#
- 1...Qb6
- 2.Qh1#
- 1...Qc7
- 2.Qh1#
- 1...Qe7
- 2.Qh1#
- 1...Qd4
- 2.Qh1#
- 1...Qd5
- 2.Qh1#
- 1...Qd6
- 2.Qh1#
- 1...Qc8
- 2.Qh1#
- 1...Qf8
- 2.Qh1#
- 1...Ra5
- 2.Qh1#
- 1...Rc6
- 2.Qh1#
- 1...g3
- 2.Sc5#
- 1...Qxd3+!
- threat
- 1.Qc1?
- threat
- 2.Qe3#
- 2.Qf4#
- 1...Qg5
- 2.Sc5#
- 1...Qb6
- 2.Qf4#
- 1...Qd4
- 2.Qf4#
- 1...Qxd3+!
- threat
- 1.f3+?
- 1...Ke3
- 2.Qc1#
- 1...gxf3!
- 1...Ke3
- 1.Kc1?
- Keys
- 1.Kd2!
- threat
- 2.Qh1#
- 1...Qa5+
- 2.Sb4#
- 1...Qg5+
- 2.Sf4#
- 1...Qxd3+
- 2.Qxd3#
- 1...Rxa2+
- 2.Bb2#
- 1...g3
- 2.f3#
- threat
- 1.Kd2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- Q(e);CHECK,OGATE,P_SPINQ(e),XS(F)::QAB1(A),XQ(e)
- Tries
- Try
- K(B);N_SPINS(F),P-FLIGHT
- Threat
- QAB(A)+S(F),DCHECK
- Vars
- Q(e);CHECK,N_GUARD::QAB(A)+S(F)
- Q(e);OGATE,P_SPINQ(e),XS(F)::QAB1(A),XQ(e)
- Refutation
- R(d);XR(J)
- Try
- K(B);N_SPINS(F),P-FLIGHT
- Threat
- QAB(A)+S(F),DCHECK
- Vars
- Q(e);CHECK,N_GUARD::QAB(A)+S(F)
- Q(e);OGATE,P_SPINQ(e),XS(F)::QAB1(A),XQ(e)
- Refutation
- R(d);XR(J)
- Try
- K(B);N_SPINS(F),S_FLIGHT
- Threat
- DUALS(2)
- Vars
- R(d);CHECK,N_GUARD,XP(C)::R(J)+B(H)
- R(d);XR(J)::QAB(A)
- Q(e);::QAB(A)
- Q(e);P_PINP(G)::QAB(A)
- R(d);::QAB(A)
- R(d);P_PINP(G)::QAB(A)
- P(b);::S(F)
- Refutation
- Q(e);CHECK,XS(F)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- Q(e);N_PINS(F)::S(F)
- Q(e);N_PINS(F)::QAR1(A)
- Q(e);::QAR1(A)
- Refutation
- Q(e);CHECK,XS(F)
- Try
- P(E);CHECK
- Vars
- K(a);P-FLIGHT::QAB(A)
- Refutation
- P(b);XP(E)
- Try
- Actual
- K(B);P-FLIGHT
- Threat
- QAB(A)
- Vars
- Q(e);CHECK,N_PINS(F)::QAB(A)+S(F)
- Q(e);CHECK,OGATE,P_SPINQ(e),XS(F)::QAB1(A),XQ(e)
- R(d);CHECK,N_GUARD,XP(C)::R(J)+B(H)
- P(b);N_GUARD::P(E)
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).