MESON Chess Problem Database
Problem Display
PID: 204260 (1qBN4/1P6/k7/2Q5/8/8/8/1K6 w - - 0 1)
de Savignac Castelet, G Arnaud
L'Echiquier Marseillais, 1925
#2
5 + 2
| 3713 | Snap | 2020 |
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qh2
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qg3
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qf4
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qe5
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qd6
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qa7
- 2.b8S#
- 1...Qc7
- 2.b8S#
- 1...Qxb7+
- 2.Bxb7#
- 1...Qa8
- 2.bxa8Q#
- 2.bxa8S#
- 2.bxa8B#
- 2.bxa8R#
- 2.b8S#
- 1...Qxc8
- 2.bxc8Q#
- 2.bxc8B#
- 1...Qh2
- Tries
- 1.Ka1?
- 1...Qxb7
- 2.Bxb7#
- 1...Qxc8
- 2.bxc8Q#
- 2.bxc8B#
- 1...Qh2
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qg3
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qf4
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qd6
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qa7
- 2.b8S#
- 1...Qc7
- 2.b8S#
- 1...Qa8
- 2.bxa8Q#
- 2.bxa8S#
- 2.bxa8B#
- 2.bxa8R#
- 2.b8S#
- 1...Qe5+!
- 1...Qxb7
- 1.Kc1?
- 1...Qxb7
- 2.Bxb7#
- 1...Qxc8
- 2.bxc8Q#
- 2.bxc8B#
- 1...Qh2
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qg3
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qe5
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qd6
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qa7
- 2.b8S#
- 1...Qc7
- 2.b8S#
- 1...Qa8
- 2.bxa8Q#
- 2.bxa8S#
- 2.bxa8B#
- 2.bxa8R#
- 2.b8S#
- 1...Qf4+!
- 1...Qxb7
- 1.Ka2?
- 1...Qxb7
- 2.Bxb7#
- 1...Qxc8
- 2.bxc8Q#
- 2.bxc8B#
- 1...Qg3
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qf4
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qe5
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qd6
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qa7
- 2.b8S#
- 1...Qc7
- 2.b8S#
- 1...Qa8
- 2.bxa8Q#
- 2.bxa8S#
- 2.bxa8B#
- 2.bxa8R#
- 2.b8S#
- 1...Qh2+!
- 1...Qxb7
- 1.Kc2?
- 1...Qxb7
- 2.Bxb7#
- 1...Qxc8
- 2.bxc8Q#
- 2.bxc8B#
- 1...Qg3
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qf4
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qe5
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qd6
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qa7
- 2.b8S#
- 1...Qc7
- 2.b8S#
- 1...Qa8
- 2.bxa8Q#
- 2.bxa8S#
- 2.bxa8B#
- 2.bxa8R#
- 2.b8S#
- 1...Qh2+!
- 1...Qxb7
- 1.Se6?
- 1...Qxc8
- 2.bxc8Q#
- 2.bxc8B#
- 1...Qh2
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qg3
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qf4
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qe5
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qd6
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qa7
- 2.Sc7#
- 2.b8S#
- 1...Qc7
- 2.Sxc7#
- 2.b8S#
- 1...Qa8
- 2.Sc7#
- 2.bxa8Q#
- 2.bxa8S#
- 2.bxa8B#
- 2.bxa8R#
- 2.b8S#
- 1...Qxb7+!
- 1...Qxc8
- 1.Sf7?
- 1...Qxc8
- 2.bxc8Q#
- 2.bxc8B#
- 1...Qh2
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qg3
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qf4
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qe5
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qd6
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qa7
- 2.b8S#
- 1...Qc7
- 2.b8S#
- 1...Qa8
- 2.bxa8Q#
- 2.bxa8S#
- 2.bxa8B#
- 2.bxa8R#
- 2.b8S#
- 1...Qxb7+!
- 1...Qxc8
- 1.Qb5+?
- 1...Ka7
- 2.Sc6#
- 2.Qa5#
- 1...Kxb5!
- 1...Ka7
- 1.Ka1?
- Keys
- 1.Sc6!
- threat
- 2.Sb4#
- 2.Sxb8#
- 2.Qa5#
- 1...Qxb7+
- 2.Sb4#
- 1...Qxc8
- 2.bxc8Q#
- 2.bxc8B#
- 1...Qh2
- 2.Sb4#
- 2.Qa5#
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qg3
- 2.Sb4#
- 2.Qa5#
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qf4
- 2.Qa5#
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qe5
- 2.Sb4#
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qd6
- 2.Sb4#
- 2.Qa5#
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Qa7
- 2.Sb4#
- 2.Qa5#
- 2.b8S#
- 1...Qc7
- 2.Sb4#
- 2.b8S#
- 1...Qa8
- 2.Sb4#
- 2.Qa5#
- 2.bxa8Q#
- 2.bxa8S#
- 2.bxa8B#
- 2.bxa8R#
- 2.b8S#
- threat
- 1.Sc6!
This anticipates 227757(1926)
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 2
- Sets
- Q(b);N_PINP(C)::P=S
- Q(b);CHECK,OGATE,P_SPINQ(b),XP(C)::B(D),XQ(b)
- Q(b);N_PINP(C),XB(D)::PXQ(b)=Q
- Tries
- Try
- K(A);N_SPINP(C),P-FLIGHT
- Vars
- Q(b);OGATE,P_SPINQ(b),XP(C)::B(D),XQ(b)
- Q(b);OGATE,XB(D)::PXQ(b)=Q
- Q(b);OGATE::P=S
- Refutation
- Q(b);CHECK
- Try
- K(A);N_SPINP(C),P-FLIGHT
- Vars
- Q(b);OGATE,P_SPINQ(b),XP(C)::B(D),XQ(b)
- Q(b);OGATE,P_PINQ(B),XB(D)::PXQ(b)=Q
- Q(b);OGATE::P=S
- Q(b);OGATE,P_PINQ(B)::P=S
- Refutation
- Q(b);CHECK
- Try
- K(A);N_SPINP(C),S_FLIGHT
- Vars
- Q(b);OGATE,P_SPINQ(b),XP(C)::B(D),XQ(b)
- Q(b);OGATE,XB(D)::PXQ(b)=Q
- Q(b);OGATE::P=S
- Refutation
- Q(b);CHECK
- Try
- K(A);N_SPINP(C),S_FLIGHT
- Vars
- Q(b);OGATE,P_SPINQ(b),XP(C)::B(D),XQ(b)
- Q(b);OGATE,P_PINQ(B),XB(D)::PXQ(b)=Q
- Q(b);OGATE::P=S
- Q(b);OGATE,P_PINQ(B)::P=S
- Refutation
- Q(b);CHECK
- Try
- S(E);
- Vars
- Q(b);N_PINP(C),XB(D)::PXQ(b)=Q
- Refutation
- Q(b);CHECK,P_SPINQ(b),XP(C)
- Try
- S(E);
- Vars
- Q(b);N_PINP(C),XB(D)::PXQ(b)=Q
- Q(b);N_PINP(C)::P=S
- Refutation
- Q(b);CHECK,P_SPINQ(b),XP(C)
- Try
- Q(B);CHECK,N_SPINP(C)
- Refutation
- K(a);S_FLIGHT,XQ(B)
- Try
- Actual
- S(E);
- Threat
- DUALS(3)
- Vars
- Q(b);CHECK,P_SPINQ(b),XP(C)::S(E)
- Q(b);N_PINP(C),XB(D)::PXQ(b)=Q
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).