MESON Chess Problem Database

Problem Display
PID: 204243 (1B2N3/1N2K1Q1/n2pBp2/pP2k2P/Rb2b1pq/2p1R1p1/4Pp1n/8 w - - 0 1)

Driver, John Edward

Il Problema, 1961

1B2N3/1N2K1Q1/n2pBp2/pP2k2P/Rb2b1pq/2p1R1p1/4Pp1n/8

#2

11 + 13

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qh3
      • 2.Qxf6#
    • 1...Qxh5
      • 2.Qxf6#
    • 1...Ba3
      • 2.Rexe4#
      • 2.Raxe4#
    • 1...Bc5
      • 2.Rexe4#
      • 2.Raxe4#
  • Tries
    • 1.Sbxd6?
      • threat
        • 2.Rxe4#
      • 1...Bxd6+
        • 2.Bxd6#
      • 1...Kf4
        • 2.Rxe4#
      • 1...Sc5
        • 2.Sf5#
      • 1...Kd4!
    • 1.Sxf6?
      • threat
        • 2.Rxe4#
      • 1...Qxf6+
        • 2.Qxf6#
      • 1...Kd4
        • 2.Rxe4#
      • 1...Kf4
        • 2.Rxe4#
      • 1...Sc5!
  • Keys
    • 1.Sexd6!
      • threat
        • 2.Rxe4#
      • 1...Bxd6+
        • 2.Bxd6#
      • 1...Kd4
        • 2.Rxe4#
      • 1...Kf4
        • 2.Rxe4#
      • 1...Sc5
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(h);N_GUARD::QAB1(I),XP(m)
    • Q(h);N_GUARD,XP(E)::QAB1(I),XP(m)
  • Tries
    • Try
      • S(G);P_PINP(m),P_SPINS(G),XP(l)
      • Threat
        • R1(B),XB(f)
      • Vars
        • B(e);CHECK,OGATE,XS(G)::B(J),XB(e)
        • K(j);N_SPINB(f),N_SPINP(m),S_FLIGHT::R1(B),XB(f)
        • S(k);N_PINS(G)::B(J)+S(G)
      • Refutation
        • K(j);N_SPINB(f),P_SPINB(e),S_FLIGHT
    • Try
      • S(K);P_SPINS(K),XP(m)
      • Threat
        • R1(B),XB(f)
      • Vars
        • Q(h);CHECK,OGATE,P_SPINQ(h),XS(K)::QAB1(I),XQ(h)
        • K(j);N_SPINB(f),N_SPINP(l),P_SPINB(e),S_FLIGHT::R1(B),XB(f)
        • K(j);N_SPINB(f),S_FLIGHT::R1(B),XB(f)
      • Refutation
        • S(k);
  • Actual
    • S(K);P_PINP(m),P_SPINS(K),XP(l)
    • Threat
      • R1(B),XB(f)
    • Vars
      • B(e);CHECK,OGATE,XS(K)::B(J),XB(e)
      • K(j);N_SPINB(f),P_SPINB(e),S_FLIGHT::R1(B),XB(f)
      • K(j);N_SPINB(f),N_SPINP(m),S_FLIGHT::R1(B),XB(f)
      • S(k);N_PINS(K)::B(J)+S(K)
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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).