MESON Chess Problem Database
Problem Display
PID: 454 (7r/B7/R4pPN/N3k2p/pp5P/qb1R1PK1/p1B5/8 w - - 0 1)
Driver, John Edward
2nd Comm., The Observer, 1955
#2
10 + 9
SOLUTION
- SOUND
- Sets
- 1...Rb8
- 2.Bxb8#
- 1...Bxc2
- 2.Sc4#
- 1...Bc4
- 2.Sxc4#
- 1...Bd5
- 2.Bd4#
- 1...Be6
- 2.Sc6#
- 1...Bg8
- 2.Bb8#
- 1...Rb8
- Tries
- 1.Sg4+?
- 1...Kf5
- 2.Rxb3#
- 2.Rd5#
- 2.Rxf6#
- 1...hxg4!
- 1...Kf5
- 1.Sf7+?
- 1...Kf5
- 2.Rxb3#
- 2.Rd5#
- 1...Bxf7!
- 1...Kf5
- 1.Bxb3?
- threat
- 2.Sc4#
- 2.Sc6#
- 2.Bd4#
- 2.Re3#
- 2.Rd5#
- 2.Re6#
- 1...Rxh6
- 2.Rd5#
- 1...axb3
- 2.Sc4#
- 1...a1Q
- 2.Sc4#
- 2.Sc6#
- 2.Re3#
- 2.Rd5#
- 2.Re6#
- 1...a1B
- 2.Sc4#
- 2.Sc6#
- 2.Re3#
- 2.Rd5#
- 2.Re6#
- 1...Qc1
- 2.Bd4#
- 2.Rd5#
- 2.Re6#
- 1...Qb2
- 2.Sc4#
- 2.Sc6#
- 2.Re3#
- 2.Rd5#
- 2.Re6#
- 1...Rc8
- 2.Bd4#
- 2.Re3#
- 2.Rd5#
- 2.Re6#
- 1...Rd8
- 2.Sc4#
- 2.Sc6#
- 2.Re3#
- 2.Re6#
- 1...Re8
- 2.Sc4#
- 2.Sc6#
- 2.Bd4#
- 2.Re3#
- 2.Rd5#
- 1...f5
- 2.Sc4#
- 2.Sf7#
- 2.Bd4#
- 2.Re3#
- 2.Rd5#
- 2.Re6#
- 1...Qxb3!
- threat
- 1.Rd1?
- threat
- 2.f4#
- 1...Bxc2
- 2.Sc4#
- 1...Bc4
- 2.Sxc4#
- 1...Bd5
- 2.Bd4#
- 1...Be6
- 2.Sc6#
- 1...Bf7
- 2.Sxf7#
- 1...Bg8
- 2.Bb8#
- 1...Qc1!
- threat
- 1.Rdd6?
- threat
- 2.Bd4#
- 2.f4#
- 1...Bxc2
- 2.Sc4#
- 2.Bd4#
- 1...a1Q
- 2.f4#
- 1...a1B
- 2.f4#
- 1...Qc1
- 2.Bd4#
- 1...Qb2
- 2.f4#
- 1...Bc4
- 2.Sxc4#
- 2.Bd4#
- 1...Be6
- 2.Bd4#
- 1...Bf7
- 2.Sxf7#
- 2.Bd4#
- 1...Bg8
- 2.Bd4#
- 1...Bd5!
- threat
- 1.Rd7?
- threat
- 2.Bd4#
- 2.f4#
- 1...Bxc2
- 2.Sc4#
- 2.Bd4#
- 1...a1Q
- 2.f4#
- 1...a1B
- 2.f4#
- 1...Qc1
- 2.Bd4#
- 1...Qb2
- 2.f4#
- 1...Bc4
- 2.Sxc4#
- 2.Bd4#
- 1...Be6
- 2.Sc6#
- 2.Bd4#
- 1...Bf7
- 2.Sxf7#
- 2.Bd4#
- 1...Bg8
- 2.Bd4#
- 2.Bb8#
- 1...Bd5!
- threat
- 1.Re6+?
- 1...Bxe6
- 2.Sc6#
- 1...Kxe6!
- 1...Bxe6
- 1.Sg4+?
- Keys
- 1.Rd2!
- threat
- 2.f4#
- 1...Bxc2
- 2.Sc4#
- 1...Bc4
- 2.Sxc4#
- 1...Bd5
- 2.Bd4#
- 1...Be6
- 2.Sc6#
- 1...Bf7
- 2.Sxf7#
- 1...Bg8
- 2.Bb8#
- threat
- 1.Rd2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 1
- Sets
- R(i);N_GUARD::B(J),XR(i)
- B(c);N_GUARD,XB(A)::S(F)
- B(c);N_GUARD::S(F),XB(c)
- B(c);SBLOCK::B(J)
- B(c);SBLOCK::S(F)
- B(c);S_CUTR(i)::B(J)
- Tries
- Try
- S(I);CHECK
- Refutation
- P(g);XS(I)
- Try
- S(I);CHECK
- Refutation
- B(c);XS(I)
- Try
- B(A);XB(c)
- Threat
- DUALS(6)
- Vars
- R(i);XS(I)::R1(B)
- P(d);XB(A)::S(F)
- Refutation
- Q(b);XB(A)
- Try
- R(B);
- Threat
- P(C)
- Vars
- B(c);N_GUARD,P_PINP(C),XB(A)::S(F)
- B(c);N_GUARD,P_PINP(C)::S(F),XB(c)
- B(c);P_PINP(C),SBLOCK::B(J)
- B(c);P_PINP(C),SBLOCK::S(F)
- B(c);N_GUARD,P_PINP(C)::S(I),XB(c)
- B(c);P_PINP(C),S_CUTR(i)::B(J)
- Refutation
- Q(b);
- Try
- R(B);
- Threat
- DUALS(2)
- Vars
- P(a);::P(C)
- Q(b);::B(J)
- Q(b);::P(C)
- B(c);P_PINP(C)::B(J)
- Refutation
- B(c);P_PINP(C)
- Try
- R(B);
- Threat
- DUALS(2)
- Vars
- P(a);::P(C)
- Q(b);::B(J)
- Q(b);::P(C)
- Refutation
- B(c);P_PINP(C)
- Try
- R(G);CHECK
- Vars
- B(c);SBLOCK,XR(G)::S(F)
- Refutation
- K(f);P-FLIGHT,XR(G)
- Try
- Actual
- R(B);
- Threat
- P(C)
- Vars
- B(c);N_GUARD,P_PINP(C),XB(A)::S(F)
- B(c);N_GUARD,P_PINP(C)::S(F),XB(c)
- B(c);P_PINP(C),SBLOCK::B(J)
- B(c);P_PINP(C),SBLOCK::S(F)
- B(c);N_GUARD,P_PINP(C)::S(I),XB(c)
- B(c);P_PINP(C),S_CUTR(i)::B(J)
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).