MESON Chess Problem Database
Problem Display
PID: 203808 (B4rR1/2NQ4/1r6/q2np3/R3pkP1/b4N2/1p3PPp/4B1nK w - - 0 1)
Clements, RH
The Problemist, 1954
#2
11 + 11
SOLUTION
- SOUND
- Sets
- 1...Qxe1
- 2.Sxd5#
- 1...Qc3
- 2.Sxd5#
- 1...Qb4
- 2.Sxd5#
- 1...Qxa4
- 2.Sxd5#
- 1...Qa6
- 2.Sxd5#
- 1...Qa7
- 2.Sxd5#
- 1...Rb3
- 2.Se6#
- 1...Rb4
- 2.Se6#
- 1...Rb5
- 2.Se6#
- 1...Re6
- 2.Sxe6#
- 1...Rb7
- 2.Se6#
- 1...Rbb8
- 2.Se6#
- 1...Rf5
- 2.Qxf5#
- 1...Rxa8
- 2.Qf5#
- 1...Rfb8
- 2.Qf5#
- 1...Rc8
- 2.Qf5#
- 1...Rd8
- 2.Qf5#
- 1...Re8
- 2.Qf5#
- 1...Rxg8
- 2.Qf5#
- 1...Bc5
- 2.Sxd5#
- 1...Bd6
- 2.Se6#
- 1...Sxf3
- 2.g3#
- 1...Sc3
- 2.Bd2#
- 2.Qd2#
- 1...Se3
- 2.Rxe4#
- 1...Sf6
- 2.Qf5#
- 1...Sxc7
- 2.Rxe4#
- 1...Se7
- 2.Rxe4#
- 1...Qxe1
- Tries
- 1.Sg5?
- threat
- 2.Rxe4#
- 2.g3#
- 1...Qxe1
- 2.Sxd5#
- 2.g3#
- 1...Qxa4
- 2.Sxd5#
- 2.g3#
- 1...Rxg8
- 2.Qf5#
- 1...Re6
- 2.Sgxe6#
- 2.Rxe4#
- 1...Rf5
- 2.Rxe4#
- 2.Qxf5#
- 1...b1Q
- 2.g3#
- 1...b1B
- 2.g3#
- 1...Se2
- 2.Sh3#
- 2.Rxe4#
- 1...Qc3
- 2.Sxd5#
- 2.Rxe4#
- 1...Qb4
- 2.Sxd5#
- 2.g3#
- 1...Rb3
- 2.Sge6#
- 2.Rxe4#
- 1...Rb4
- 2.Sge6#
- 2.g3#
- 1...Bb4
- 2.g3#
- 1...Sc3
- 2.Bd2#
- 2.g3#
- 1...Sb4
- 2.g3#
- 1...Sf6
- 2.Qf5#
- 2.g3#
- 1...Rg6!
- threat
- 1.Bd2+?
- 1...Se3
- 2.Bxe3#
- 2.Rxe4#
- 1...Qxd2!
- 1...Se3
- 1.Bc3?
- threat
- 2.Bxe5#
- 1...Qxc3
- 2.Sxd5#
- 1...Sxf3
- 2.g3#
- 1...Sxc3
- 2.Qd2#
- 1...Sxc7
- 2.Rxe4#
- 2.Qd2#
- 1...Re6
- 2.Sxe6#
- 1...Rf5
- 2.Qxf5#
- 1...Re8
- 2.Qf5#
- 1...Bd6
- 2.Se6#
- 1...Se3
- 2.Rxe4#
- 1...Sf6
- 2.Qf5#
- 2.Qd2#
- 1...Se7
- 2.Rxe4#
- 2.Qd2#
- 1...Sb4!
- threat
- 1.Rxf8+?
- 1...Bxf8
- 2.Qf5#
- 1...Sf6
- 2.Rxe4#
- 2.Qf5#
- 1...Rf6!
- 1...Bxf8
- 1.Qf7+?
- 1...Rf6
- 2.Se6#
- 1...Sf6
- 2.Rxe4#
- 1...Rxf7!
- 1...Rf6
- 1.Qh7?
- threat
- 2.Rxe4#
- 2.Qxe4#
- 2.Qxh2#
- 1...Qxe1
- 2.Sxd5#
- 2.Qxh2#
- 1...Qxa4
- 2.Sxd5#
- 2.Qxh2#
- 1...Rxg8
- 2.Rxe4#
- 2.Qxe4#
- 2.Qf5#
- 1...Sxf3
- 2.Rxe4#
- 2.Qxe4#
- 2.g3#
- 1...b1Q
- 2.Qxh2#
- 1...b1B
- 2.Qxh2#
- 1...Qb4
- 2.Sxd5#
- 2.Qxh2#
- 1...Rb4
- 2.Se6#
- 2.Qxh2#
- 2.Qh6#
- 1...Rh6
- 2.Rxe4#
- 2.Qxe4#
- 2.Qxh6#
- 1...Rf5
- 2.Qxf5#
- 2.Qxh2#
- 1...Bb4
- 2.Qxh2#
- 1...Se2
- 2.Rxe4#
- 2.Qxe4#
- 1...Sh3
- 2.Rxe4#
- 2.Qxe4#
- 1...Sc3
- 2.Bd2#
- 2.Qxh2#
- 1...Sb4
- 2.Qxe4#
- 2.Qxh2#
- 1...Sf6
- 2.Qf5#
- 2.Qxh2#
- 2.Qh6#
- 1...Rg6!
- threat
- 1.Sg5?
- Keys
- 1.Qe6!
- threat
- 2.Qxe5#
- 1...Rxe6
- 2.Sxe6#
- 1...Rxg8
- 2.Qf5#
- 1...Sxf3
- 2.g3#
- 1...Sxc7
- 2.Rxe4#
- 1...Qc3
- 2.Sxd5#
- 1...Rf5
- 2.Qxf5#
- 1...Re8
- 2.Qf5#
- 1...Bd6
- 2.Qh6#
- 1...Sc3
- 2.Bd2#
- 1...Se3
- 2.Rxe4#
- 1...Sb4
- 2.Rxf8#
- 1...Sf6
- 2.Qf5#
- 1...Se7
- 2.Rxe4#
- threat
- 1.Qe6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 15
- Sets
- Q(g);N_GUARD,XB(A)::S(H),XS(h)
- Q(g);N_GUARD::S(H),XS(h)
- Q(g);N_GUARD,N_SPINP(e)::S(H),XS(h)
- Q(g);N_GUARD,N_SPINP(e),XR(F)::S(H),XS(h)
- R(j);N_GUARD::S(H)
- R(j);N_GUARD,N_SPINP(e)::S(H)
- R(j);N_GUARD::S(H),XR(j)
- R(k);N_GUARD::QAR1(I),XR(k)
- R(k);N_GUARD,XB(J)::QAR1(I)
- R(k);N_GUARD::QAR1(I)
- R(k);N_GUARD,XR(K)::QAR1(I)
- B(d);S_CUTQ(g)::S(H),XS(h)
- B(d);S_CUTR(j)::S(H)
- S(a);SBLOCK,XS(E)::P(D)
- S(h);::R1(F),XP(e)
- S(h);S_CUTR(k)::QAR1(I)
- S(h);XS(H)::R1(F),XP(e)
- Tries
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- R(k);N_GUARD,XR(K)::QAR1(I)
- P(b);::P(D)
- B(d);N_SPINP(e)::P(D)
- S(h);N_SPINP(e)::P(D)
- Refutation
- R(j);
- Try
- B(A);CHECK
- Refutation
- Q(g);XB(A)
- Try
- B(A);
- Threat
- B(A),XP(i)
- Vars
- Q(g);N_GUARD,XB(A)::S(H),XS(h)
- S(a);SBLOCK,XS(E)::P(D)
- S(h);OGATE,XB(A)::QAB(I)
- R(j);N_GUARD::S(H),XR(j)
- R(k);N_GUARD::QAR1(I),XR(k)
- R(k);N_GUARD::QAR1(I)
- B(d);S_CUTR(j)::S(H)
- S(h);::R1(F),XP(e)
- Refutation
- S(h);N_SPINP(e)
- Try
- R(K);CHECK,XR(k)
- Vars
- B(d);XR(K)::QAR1(I)
- Refutation
- R(j);P_SPINR(j)
- Try
- Q(I);CHECK
- Vars
- R(j);P_SPINR(j)::S(H)
- S(h);P_SPINS(h)::R1(F),XP(e)
- Refutation
- R(k);XQ(I)
- Try
- Q(I);
- Threat
- DUALS(3)
- Vars
- P(b);::QAB(I),XP(c)
- B(d);N_SPINP(e)::QAB(I),XP(c)
- Refutation
- R(j);
- Try
- Actual
- Q(I);
- Threat
- QAB1(I),XP(i)
- Vars
- R(j);XQ(I)::S(H),XR(j)
- R(k);N_GUARD,XR(K)::QAR1(I)
- S(a);SBLOCK,XS(E)::P(D)
- S(h);XS(H)::R1(F),XP(e)
- Q(g);N_GUARD::S(H),XS(h)
- R(k);N_GUARD::QAR1(I),XR(k)
- R(k);N_GUARD::QAR1(I)
- B(d);S_CUTR(j)::QAB(I)
- S(h);N_GUARD,S_CUTQ(g)::B(A)
- S(h);::R1(F),XP(e)
- S(h);N_GUARD,N_SPINP(e),S_CUTB(d)::R(K),XR(k)
- S(h);S_CUTR(k)::QAR1(I)
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).