MESON Chess Problem Database

Problem Display
PID: 10074 (2B2brn/2Pnp2r/R2Bk1p1/3p2Pp/p2pb2K/5QN1/3p2p1/4R3 w - - 0 1)

Chandler, Guy Wills

The Problemist, 1961

2B2brn/2Pnp2r/R2Bk1p1/3p2Pp/p2pb2K/5QN1/3p2p1/4R3

#2

9 + 15

SOLUTION

  • SOUND
  • Sets
    • 1...Rf7
      • 2.Bf4#
    • 1...exd6
      • 2.Qf6#
  • Tries
    • 1.Sxe4?
      • threat
        • 2.Sxd2#
        • 2.Sc5#
        • 2.Bh2#
        • 2.Bg3#
      • 1...dxe1Q+
        • 2.Bg3#
      • 1...dxe1B+
        • 2.Bg3#
      • 1...dxe1S
        • 2.Sc5#
        • 2.Bh2#
        • 2.Bg3#
      • 1...dxe1R
        • 2.Sc5#
        • 2.Bh2#
        • 2.Bg3#
      • 1...exd6
        • 2.Sxd2#
        • 2.Sc5#
        • 2.Qf6#
      • 1...d1Q
        • 2.Sc5#
        • 2.Bh2#
        • 2.Bg3#
      • 1...d1S
        • 2.Sc5#
        • 2.Bh2#
        • 2.Bg3#
      • 1...d1B
        • 2.Sc5#
        • 2.Bh2#
        • 2.Bg3#
      • 1...d1R
        • 2.Sc5#
        • 2.Bh2#
        • 2.Bg3#
      • 1...g1Q
        • 2.Sc5#
        • 2.Bh2#
        • 2.Bg3#
      • 1...g1S
        • 2.Sc5#
        • 2.Bh2#
        • 2.Bg3#
      • 1...g1B
        • 2.Sc5#
        • 2.Bh2#
        • 2.Bg3#
      • 1...g1R
        • 2.Sc5#
        • 2.Bh2#
        • 2.Bg3#
      • 1...Bg7
        • 2.Sc5#
        • 2.Bh2#
        • 2.Bg3#
      • 1...Sf7
        • 2.Sc5#
        • 2.Qh3#
      • 1...dxe4!
    • 1.Sxh5?
      • threat
        • 2.Bh2#
        • 2.Bg3#
      • 1...dxe1Q+
        • 2.Bg3#
      • 1...dxe1B+
        • 2.Bg3#
      • 1...exd6
        • 2.Qf6#
      • 1...Sf7
        • 2.Qg4#
        • 2.Qh3#
      • 1...Rxh5+!
    • 1.Qf4?
      • threat
        • 2.Ba3#
        • 2.Bb4#
        • 2.Bc5#
        • 2.Be5#
      • 1...exd6
        • 2.Qf6#
      • 1...a3
        • 2.Bxa3#
        • 2.Bb4#
        • 2.Bc5#
        • 2.Be5#
      • 1...Sf7!
    • 1.Qxf8?
      • threat
        • 2.Bf4#
      • 1...exd6
        • 2.Qf6#
      • 1...Sf7
        • 2.Qxe7#
      • 1...Rxf8!
  • Keys
    • 1.Sh1!
      • threat
        • 2.Bh2#
        • 2.Bg3#
      • 1...dxe1Q+
        • 2.Bg3#
      • 1...dxe1B+
        • 2.Bg3#
      • 1...gxh1Q+
        • 2.Bh2#
      • 1...gxh1R+
        • 2.Bh2#
      • 1...exd6
        • 2.Qf6#
      • 1...Sf7
        • 2.Qh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • R(l);SBLOCK::R(F)+B(G)
    • P(k);N_GUARD,P_SPINP(k),XB(G)::QAR1(B)
  • Tries
    • Try
      • S(C);XB(e)
      • Threat
        • DUALS(4)
      • Vars
        • P(a);CHECK,XR(A)::R(F)+B(G)
      • Refutation
        • P(f);P_SPINP(f),XS(C)
    • Try
      • S(C);P_SPINS(C),XP(g)
      • Threat
        • DUALS(2)
      • Vars
        • P(a);CHECK,N_SPINB(e),XR(A)::R(F)+B(G)
        • P(k);N_GUARD,P_SPINP(k),XB(G)::QAR1(B)
      • Refutation
        • R(l);CHECK,XS(C)
    • Try
      • Q(B);
      • Threat
        • DUALS(4)
      • Vars
        • P(k);N_GUARD,P_SPINP(k),XB(G)::QAR1(B)
      • Refutation
        • S(o);
    • Try
      • Q(B);XB(m)
      • Threat
        • R(F)+B(G)
      • Vars
        • P(k);N_GUARD,P_SPINP(k),XB(G)::QAR1(B)
        • S(o);S_CUTR(l)::QAR1(B),XP(k)
      • Refutation
        • R(n);XQ(B)
  • Actual
    • S(C);
    • Threat
      • DUALS(2)
    • Vars
      • P(a);CHECK,N_SPINB(e),XR(A)::R(F)+B(G)
      • P(b);CHECK,XS(C)::R(F)+B(G)
      • P(k);N_GUARD,P_SPINP(k),XB(G)::QAR1(B)
      • S(o);SBLOCK::QAB(B)
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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).