MESON Chess Problem Database
Problem Display
PID: 107716 (8/8/1Np3K1/4p3/nQ1Bk3/4b3/2bRBRP1/1N6 w - - 0 1)
Beechey, H
8. American Chess Congress, 1921
#2
9 + 6
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Bxb1
- 2.Qxb1#
- 1...Bd1
- 2.Bd3#
- 1...Bb3
- 2.Bd3#
- 1...Bd3
- 2.Bxd3#
- 1...Bxd2
- 2.Sxd2#
- 1...Bxf2
- 2.Bxf2#
- 1...Bf4
- 2.Bf3#
- 2.Bc5#
- 1...Bg5
- 2.Bc5#
- 1...Bh6
- 2.Bc5#
- 1...Sb2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sc5
- 2.Sc3#
- 1...Sxb6
- 2.Sc3#
- 1...exd4
- 2.Qe7#
- 1...Bxb1
- Tries
- 1.Bg4?
- threat
- 2.Bf5#
- 1...Bxf2
- 2.Bxf2#
- 1...Sxb6
- 2.Sc3#
- 1...exd4
- 2.Qe7#
- 1...Bxd4!
- threat
- 1.Bb5?
- threat
- 2.Bxc6#
- 1...Bxd2
- 2.Sxd2#
- 1...Bxf2
- 2.Bxf2#
- 1...Bxd4
- 2.Rde2#
- 1...Sxb6
- 2.Sc3#
- 1...exd4
- 2.Qe7#
- 1...Bb3
- 2.Bd3#
- 1...Sc3
- 2.Sxc3#
- 1...c5
- 2.Bc6#
- 1...cxb5!
- threat
- 1.Bxe5+?
- 1...Bd4
- 2.Qxd4#
- 1...Kxe5+!
- 1...Bd4
- 1.Rd3?
- threat
- 2.Bxe3#
- 2.Rxe3#
- 1...Bxf2
- 2.Bxf2#
- 2.Be3#
- 1...Bxd4
- 2.Sd2#
- 1...Sxb6
- 2.Sc3#
- 1...exd4
- 2.Qe7#
- 1...Bb3
- 2.Rxe3#
- 1...Bc1
- 2.Ba1#
- 2.Bb2#
- 2.Bc3#
- 2.Be3#
- 2.Bc5#
- 1...Bd2
- 2.Sxd2#
- 2.Bc3#
- 1...Bf4
- 2.Ba1#
- 2.Bb2#
- 2.Bc3#
- 2.Be3#
- 2.Bc5#
- 1...Bg5
- 2.Ba1#
- 2.Bb2#
- 2.Bc3#
- 2.Be3#
- 2.Bc5#
- 1...Bh6
- 2.Ba1#
- 2.Bb2#
- 2.Bc3#
- 2.Be3#
- 2.Bc5#
- 1...Sb2
- 2.Sc3#
- 2.Rxe3#
- 1...c5
- 2.Rxe3#
- 1...Bxd3!
- threat
- 1.Rf4+?
- 1...Bxf4
- 2.Bf3#
- 2.Bg1#
- 2.Bf2#
- 2.Bc5#
- 1...exf4
- 2.Bf3#
- 2.Qe7#
- 1...Kxf4+!
- 1...Bxf4
- 1.Rf5?
- threat
- 2.Bf3#
- 1...Bxd2
- 2.Sxd2#
- 1...Bd1
- 2.Bd3#
- 1...Bxd4!
- threat
- 1.Rf6?
- threat
- 2.Bf3#
- 1...Bxd2
- 2.Sxd2#
- 1...exd4
- 2.Qe7#
- 1...Bd1
- 2.Bd3#
- 1...Bxd4!
- threat
- 1.Rf7?
- threat
- 2.Bf3#
- 1...Bxd2
- 2.Sxd2#
- 1...exd4
- 2.Qe7#
- 1...Bd1
- 2.Bd3#
- 1...Bxd4!
- threat
- 1.Rf8?
- threat
- 2.Bf3#
- 1...Bxd2
- 2.Sxd2#
- 1...exd4
- 2.Qe7#
- 1...Bd1
- 2.Bd3#
- 1...Bxd4!
- threat
- 1.Qa5?
- threat
- 2.Qxe5#
- 1...exd4
- 2.Qf5#
- 1...c5
- 2.Qa8#
- 1...Bf4
- 2.Bf3#
- 1...Sc5
- 2.Sc3#
- 1...Bxd4!
- threat
- 1.Qc5?
- threat
- 2.Qxc2#
- 2.Qxe5#
- 2.Qxc6#
- 1...Bxb1
- 2.Qxe5#
- 2.Qxc6#
- 1...Bxd2
- 2.Sxd2#
- 2.Qxe5#
- 1...Bxf2
- 2.Qxe5#
- 1...Sxc5
- 2.Sc3#
- 1...Sxb6
- 2.Sc3#
- 2.Qxe5#
- 1...exd4
- 2.Qe7#
- 2.Qf5#
- 1...Bd1
- 2.Bd3#
- 2.Qxe5#
- 2.Qxc6#
- 1...Bb3
- 2.Bd3#
- 2.Qxe5#
- 1...Bd3
- 2.Bxd3#
- 2.Qxe5#
- 1...Bf4
- 2.Bf3#
- 2.Qxc2#
- 2.Qxc6#
- 1...Sb2
- 2.Sc3#
- 2.Qxe5#
- 2.Qxc6#
- 1...Sc3
- 2.Sxc3#
- 2.Qxe5#
- 1...Bxd4!
- threat
- 1.Qd6?
- threat
- 2.Qxe5#
- 2.Qxc6#
- 1...Bxd2
- 2.Sxd2#
- 2.Qxe5#
- 1...Bxf2
- 2.Qxe5#
- 1...Sxb6
- 2.Sc3#
- 2.Qxe5#
- 1...exd4
- 2.Bf3#
- 2.Qe7#
- 2.Qe6#
- 1...c5
- 2.Qxe5#
- 2.Qd5#
- 2.Qc6#
- 1...Bb3
- 2.Bd3#
- 2.Qxe5#
- 1...Bd3
- 2.Bxd3#
- 2.Qxe5#
- 1...Bf4
- 2.Bf3#
- 2.Qxc6#
- 1...Sc3
- 2.Sxc3#
- 2.Qxe5#
- 1...Bxd4!
- threat
- 1.Qe7?
- threat
- 2.Qxe5#
- 1...Bf4
- 2.Bf3#
- 1...Bxd4!
- threat
- 1.Qc4?
- threat
- 2.Qxc2#
- 2.Qxc6#
- 1...Bxb1
- 2.Qxc6#
- 1...Bxd2
- 2.Sxd2#
- 2.Bc5#
- 1...Bxf2
- 2.Bxf2#
- 1...Sxb6
- 2.Sc3#
- 1...exd4
- 2.Qe6#
- 1...c5
- 2.Qd5#
- 2.Qxc2#
- 1...Bd1
- 2.Bd3#
- 2.Qd3#
- 2.Qxc6#
- 1...Bb3
- 2.Bd3#
- 2.Qd3#
- 1...Bd3
- 2.Bxd3#
- 2.Qxd3#
- 1...Sb2
- 2.Sc3#
- 2.Qxc6#
- 1...Sc3
- 2.Sxc3#
- 1...Sc5
- 2.Sc3#
- 1...Bxd4!
- threat
- 1.g3?
- threat
- 2.Bf3#
- 1...Bxd2
- 2.Sxd2#
- 1...Bxf2
- 2.Bxf2#
- 1...exd4
- 2.Qe7#
- 1...Bd1
- 2.Bd3#
- 1...Bxd4!
- threat
- 1.Bg4?
- Keys
- 1.Ba6!
- 1...Bxb1
- 2.Qxb1#
- 1...Bxd2
- 2.Sxd2#
- 1...Bxf2
- 2.Bxf2#
- 1...Bxd4
- 2.Rde2#
- 1...Sxb6
- 2.Sc3#
- 1...exd4
- 2.Qe7#
- 1...Bd1
- 2.Bd3#
- 1...Bb3
- 2.Bd3#
- 1...Bd3
- 2.Bxd3#
- 1...Bf4
- 2.Bc5#
- 1...Bg5
- 2.Bc5#
- 1...Bh6
- 2.Bc5#
- 1...Sb2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sc5
- 2.Sc3#
- 1...c5
- 2.Bb7#
- 1...Bxb1
- 1.Ba6!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- B(a);OGATE,XS(A)::QAB(F),XB(a)
- B(a);N_GUARD::B(C)
- B(a);N_GUARD::B(C),XB(a)
- B(b);XR(B)::S(A),XB(b)
- B(b);OGATE,XR(D)::QAR(F)+B(G),XB(b)
- B(b);N_GUARD::QAR(F)+B(G)
- S(c);N_GUARD::S(A)
- S(c);N_GUARD::S(A),XS(c)
- S(c);N_GUARD,XS(H)::S(A)
- P(e);OGATEB,P_SPINP(e),XB(G)::QAR(F)
- Tries
- Try
- B(C);
- Threat
- B(C)
- Vars
- B(b);OGATE,XR(D)::QAR(F)+B(G),XB(b)
- S(c);N_GUARD,XS(H)::S(A)
- P(e);OGATEB,P_SPINP(e),XB(G)::QAR(F)
- Refutation
- B(b);P_SPINB(b),XB(G)
- Try
- B(C);
- Threat
- B(C),XP(f)
- Vars
- B(b);XR(B)::S(A),XB(b)
- B(b);OGATE,XR(D)::QAR(F)+B(G),XB(b)
- B(b);OGATEB,P_SPINB(b),XB(G)::R(B)
- S(c);N_GUARD,XS(H)::S(A)
- P(e);OGATEB,P_SPINP(e),XB(G)::QAR(F)
- B(a);N_GUARD::B(C)
- S(c);N_GUARD::S(A),XS(c)
- P(f);::B(C)
- Refutation
- P(f);XB(C)
- Try
- B(G);CHECK,XP(e)
- Vars
- B(b);N_GUARD,P_SPINB(b)::QAR1(F),XB(b)
- Refutation
- K(d);CHECK,P-FLIGHT,XB(G)
- Try
- R(B);
- Threat
- DUALS(2)
- Vars
- B(b);N_GUARD,P_SPINB(b),XB(G)::S(A)
- S(c);N_GUARD,XS(H)::S(A)
- P(e);OGATEB,P_SPINP(e),XB(G)::QAR(F)
- B(a);::R1(B),XB(b)
- P(f);::R1(B),XB(b)
- Refutation
- B(a);XR(B)
- Try
- R(D);CHECK
- Refutation
- K(d);CHECK,P-FLIGHT,XR(D)
- Try
- R(D);
- Threat
- B(C)
- Vars
- B(b);XR(B)::S(A),XB(b)
- B(a);N_GUARD::B(C)
- Refutation
- B(b);P_SPINB(b),XB(G)
- Try
- R(D);
- Threat
- B(C)
- Vars
- B(b);XR(B)::S(A),XB(b)
- P(e);OGATEB,P_SPINP(e),XB(G)::QAR(F)
- B(a);N_GUARD::B(C)
- Refutation
- B(b);P_SPINB(b),XB(G)
- Try
- R(D);
- Threat
- B(C)
- Vars
- B(b);XR(B)::S(A),XB(b)
- P(e);OGATEB,P_SPINP(e),XB(G)::QAR(F)
- B(a);N_GUARD::B(C)
- Refutation
- B(b);P_SPINB(b),XB(G)
- Try
- R(D);
- Threat
- B(C)
- Vars
- B(b);XR(B)::S(A),XB(b)
- P(e);OGATEB,P_SPINP(e),XB(G)::QAR(F)
- B(a);N_GUARD::B(C)
- Refutation
- B(b);P_SPINB(b),XB(G)
- Try
- Q(F);
- Threat
- QAR1(F),XP(e)
- Vars
- P(e);OGATE,XB(G)::QAB1(F)
- P(f);OGATEB::QAB(F)
- B(b);SBLOCK::B(C)
- S(c);N_GUARD::S(A)
- Refutation
- B(b);XB(G)
- Try
- Q(F);
- Threat
- DUALS(3)
- Vars
- B(b);XR(D)::QAR1(F),XP(e)
- S(c);N_GUARD,XQ(F)::S(A)
- Refutation
- B(b);XB(G)
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- B(b);XR(D)::QAR1(F),XP(e)
- Refutation
- B(b);XB(G)
- Try
- Q(F);P_PINP(e)
- Threat
- QAR1(F),XP(e)
- Vars
- B(b);SBLOCK::B(C)
- Refutation
- B(b);XB(G)
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- B(a);XS(A)::QAB(F),XP(f)
- B(b);OGATE,XR(D)::QAR(F)+B(G),XB(b)
- S(c);N_GUARD,XS(H)::S(A)
- P(e);OGATEB,P_SPINP(e),XB(G)::QAR2(F)
- S(c);N_GUARD::S(A),XS(c)
- S(c);N_GUARD::S(A)
- Refutation
- B(b);P_SPINB(b),XB(G)
- Try
- P(E);
- Threat
- B(C)
- Vars
- B(b);XR(B)::S(A),XB(b)
- B(b);OGATE,XR(D)::QAR(F)+B(G),XB(b)
- P(e);OGATEB,P_SPINP(e),XB(G)::QAR(F)
- B(a);N_GUARD::B(C)
- Refutation
- B(b);P_SPINB(b),XB(G)
- Try
- Actual
- B(C);
- Vars
- B(a);OGATE,XS(A)::QAB(F),XB(a)
- B(b);XR(B)::S(A),XB(b)
- B(b);OGATE,XR(D)::QAR(F)+B(G),XB(b)
- B(b);OGATEB,P_SPINB(b),XB(G)::R(B)
- S(c);N_GUARD,XS(H)::S(A)
- P(e);OGATEB,P_SPINP(e),XB(G)::QAR(F)
- B(a);N_GUARD::B(C)
- B(a);N_GUARD::B(C),XB(a)
- B(b);N_GUARD::QAR(F)+B(G)
- S(c);N_GUARD::S(A)
- S(c);N_GUARD::S(A),XS(c)
- P(f);OGATEB::B(C)
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).