MESON Chess Problem Database
Problem Display
PID: 166676 (K3Q1B1/p3p1N1/2RP1p2/5p1r/2pkpP1b/r6R/b2BP3/2n3N1 w - - 0 1)
Driver, John Edward
7th Prize, BCPS-40 JT, 1958-1960
#2
11 + 12
SOLUTION
- SOUND
- Sets
- 1...Rb3
- 2.Rxc4#
- 1...Rc3
- 2.Bxc3#
- 1...Ra4
- 2.Bc3#
- 1...Ra5
- 2.Bc3#
- 1...Ra6
- 2.Bc3#
- 1...Rh6
- 2.Sxf5#
- 1...Rh7
- 2.Sxf5#
- 1...Rh8
- 2.Sxf5#
- 1...Bb1
- 2.Rxc4#
- 1...Bb3
- 2.Bc3#
- 1...Bg5
- 2.Sxf5#
- 1...Sxe2
- 2.Sxe2#
- 1...Sb3
- 2.Bc3#
- 2.Rxc4#
- 1...Sd3
- 2.e3#
- 1...c3
- 2.Be3#
- 1...Rb3
- Tries
- 1.Qf7?
- threat
- 2.Qd5#
- 1...Ra5
- 2.Bc3#
- 1...c3
- 2.Be3#
- 1...e6!
- threat
- 1.dxe7?
- threat
- 2.Qd7#
- 2.Qd8#
- 1...Ra5
- 2.Bc3#
- 1...c3
- 2.Be3#
- 1...e3!
- threat
- 1.d7?
- threat
- 2.d8Q#
- 2.d8R#
- 1...Rxh3
- 2.d8Q#
- 2.d8R#
- 1...Sxe2
- 2.Sxe2#
- 2.d8Q#
- 2.d8R#
- 1...e6
- 2.d8Q#
- 2.d8R#
- 1...Rb3
- 2.Rxc4#
- 2.d8Q#
- 2.d8R#
- 1...Rc3
- 2.Bxc3#
- 2.d8Q#
- 2.d8R#
- 1...Rd3
- 2.d8Q#
- 2.d8R#
- 1...Re3
- 2.d8Q#
- 2.d8R#
- 1...Rf3
- 2.d8Q#
- 2.d8R#
- 1...Rg3
- 2.d8Q#
- 2.d8R#
- 1...Ra4
- 2.Bc3#
- 2.d8Q#
- 2.d8R#
- 1...Ra5
- 2.Bc3#
- 1...Ra6
- 2.Bc3#
- 2.d8Q#
- 2.d8R#
- 1...Rg5
- 2.d8Q#
- 2.d8R#
- 1...Rh6
- 2.Sxf5#
- 2.d8Q#
- 2.d8R#
- 1...Rh7
- 2.Sxf5#
- 2.d8Q#
- 2.d8R#
- 1...Rh8
- 2.Sxf5#
- 2.d8Q#
- 2.d8R#
- 1...Bb1
- 2.Rxc4#
- 2.d8Q#
- 2.d8R#
- 1...Bb3
- 2.Bc3#
- 2.d8Q#
- 2.d8R#
- 1...Be1
- 2.d8Q#
- 2.d8R#
- 1...Bf2
- 2.d8Q#
- 2.d8R#
- 1...Bg3
- 2.d8Q#
- 2.d8R#
- 1...Bg5
- 2.Sxf5#
- 2.d8Q#
- 2.d8R#
- 1...Sb3
- 2.Bc3#
- 2.Rxc4#
- 2.d8Q#
- 2.d8R#
- 1...Sd3
- 2.e3#
- 2.d8Q#
- 2.d8R#
- 1...c3
- 2.Be3#
- 1...a5
- 2.d8Q#
- 2.d8R#
- 1...a6
- 2.d8Q#
- 2.d8R#
- 1...e5
- 2.d8Q#
- 2.d8R#
- 1...e3!
- threat
- 1.Qf7?
- Keys
- 1.Qxe7!
- 1...Rxh3
- 2.Qxa7#
- 1...Sxe2
- 2.Sxe2#
- 1...Rb3
- 2.Rxc4#
- 1...Rc3
- 2.Bxc3#
- 2.Qxa7#
- 1...Rd3
- 2.Qxa7#
- 1...Re3
- 2.Qxa7#
- 1...Rf3
- 2.Qxa7#
- 1...Rg3
- 2.Qxa7#
- 1...Ra4
- 2.Bc3#
- 1...Ra5
- 2.Bc3#
- 1...Ra6
- 2.Bc3#
- 1...Rg5
- 2.Qxf6#
- 1...Rh6
- 2.Sxf5#
- 1...Rh7
- 2.Sxf5#
- 1...Rh8
- 2.Sxf5#
- 1...Bb1
- 2.Rxc4#
- 1...Bb3
- 2.Bc3#
- 1...Be1
- 2.Qxf6#
- 1...Bf2
- 2.Qxf6#
- 1...Bg3
- 2.Qxf6#
- 1...Bg5
- 2.Sxf5#
- 1...Sb3
- 2.Bc3#
- 2.Rxc4#
- 1...Sd3
- 2.e3#
- 1...c3
- 2.Be3#
- 1...e3
- 2.Sf3#
- 1...a5
- 2.Qa7#
- 1...a6
- 2.Qa7#
- 1...Rxh3
- 1.Qxe7!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 12
- REMOVED MATES = 1
- Sets
- R(c);S_CUTB(b)::R1(F),XP(d)
- R(c);N_GUARD::B(B),XR(c)
- R(c);N_GUARD::B(B)
- R(i);N_GUARD::S(H),XP(h)
- B(b);N_GUARD::R1(F),XP(d)
- B(b);S_CUTR(c)::B(B)
- B(g);S_CUTR(i)::S(H),XP(h)
- S(a);XP(C)::S(A),XS(a)
- S(a);SBLOCK,S_CUTR(c)::P(C)
- P(d);S_CUTR(c)::B(B)
- Tries
- Try
- Q(J);
- Threat
- QAR1(J)
- Vars
- R(c);N_GUARD::B(B)
- P(d);S_CUTR(c)::B(B)
- Refutation
- P(l);
- Try
- P(G);XP(l)
- Threat
- DUALS(2)
- Vars
- R(c);N_GUARD::B(B)
- P(d);S_CUTR(c)::B(B)
- Refutation
- P(f);
- Try
- P(G);
- Threat
- P=Q
- Vars
- R(c);XR(D)::P=Q
- P(l);::P=Q
- R(c);::P=Q
- R(c);N_GUARD::B(B)
- R(i);::P=Q
- B(g);::P=Q
- P(d);S_CUTR(c)::B(B)
- P(k);::P=Q
- Refutation
- P(f);
- Try
- Actual
- Q(J);XP(l)
- Vars
- R(c);N_GUARD,XR(D)::QAB(J),XP(k)
- S(a);XP(C)::S(A),XS(a)
- R(c);S_CUTB(b)::R1(F),XP(d)
- R(c);N_GUARD::QAB(J),XP(k)
- R(c);N_GUARD::B(B)
- R(i);S_CUTB(g)::QAB(J),XP(j)
- R(i);N_GUARD::S(H),XP(h)
- R(i);N_GUARD,P_PINB(K)::S(H),XP(h)
- B(b);N_GUARD::R1(F),XP(d)
- B(b);S_CUTR(c)::B(B)
- B(g);N_GUARD::QAB(J),XP(j)
- B(g);S_CUTR(i)::S(H),XP(h)
- S(a);SBLOCK,S_CUTR(c)::P(C)
- P(d);S_CUTR(c)::B(B)
- P(f);N_GUARD,S_CUTR(c)::S(A)
- P(k);S_CUTR(c)::QAB(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).