MESON Chess Problem Database

Problem Display
PID: 96310 (Bn2R3/r3nR1K/1pP4p/4N2N/2QPk3/4p3/4p1Pb/8 w - - 0 1)

Byas, Walter

The Chess Problem, 1946

Bn2R3/r3nR1K/1pP4p/4N2N/2QPk3/4p3/4p1Pb/8

#2

10 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Sg3#
      • 2.Rf4#
    • 1...Bg3
      • 2.Sxg3#
    • 1...Bf4
      • 2.Rxf4#
    • 1...Sd5
      • 2.Qd3#
    • 1...Sg6
      • 2.d5#
    • 1...Sc8
      • 2.d5#
    • 1...Sg8
      • 2.d5#
  • Tries
    • 1.Sd3?
      • threat
        • 2.d5#
      • 1...Sxc6
        • 2.Bxc6#
      • 1...Be5
        • 2.dxe5#
      • 1...b5
        • 2.Sc5#
      • 1...Ra4!
  • Keys
    • 1.g3!
      • threat
        • 2.Rf4#
      • 1...Bxg3
        • 2.Sxg3#
      • 1...Sexc6
        • 2.Sd7#
      • 1...Sd5
        • 2.Qd3#
      • 1...Sf5
        • 2.Sf6#
      • 1...Sg6
        • 2.d5#
      • 1...Sc8
        • 2.d5#
      • 1...Sg8
        • 2.d5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(b);N_GUARD::S(E),XB(b)
    • B(b);N_GUARD::R1(G),XB(b)
    • S(h);P_PINR(G),SBLOCK::QAB1(B)
    • S(h);P_PINR(G)::QAR(B)+P(C)
  • Tries
    • Try
      • S(D);P_PINS(h)
      • Threat
        • QAR(B)+P(C)
      • Vars
        • S(i);N_SPINS(h),OGATE,P_SPINS(i),XP(F)::B(I),XS(i)
        • B(b);N_SPINS(h),OGATE::QAR(B)+P(C),XB(b)
        • P(e);N_GUARD::S(D)
      • Refutation
        • R(g);
  • Actual
    • P(A);
    • Threat
      • R1(G)
    • Vars
      • B(b);XP(A)::S(E),XB(b)
      • S(h);P_PINR(G),P_SPINS(h),XP(F)::R(J)+S(D)
      • S(h);P_PINR(G),SBLOCK::QAB1(B)
      • S(h);P_PINR(G),SBLOCK::S(E)
      • S(h);P_PINR(G)::QAR(B)+P(C)
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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).