MESON Chess Problem Database

Problem Display
PID: 186685 (1N3N2/n1rpB2K/P2r1p2/Pbk1b2R/B3P3/1Q1pP3/2p5/2q5 w - - 0 1)

Benthall, Paul

Chess, 1960

1N3N2/n1rpB2K/P2r1p2/Pbk1b2R/B3P3/1Q1pP3/2p5/2q5

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rc6
      • 2.Sbxd7#
      • 2.Sfxd7#
    • 1...Bc4
      • 2.Qb6#
    • 1...Bxa6
      • 2.Sxa6#
    • 1...Bc6
      • 2.Qc3#
    • 1...Sc6
      • 2.Qxb5#
    • 1...Sc8
      • 2.Qxb5#
  • Tries
    • 1.Sbxd7+?
      • 1...Kc6
        • 2.Qc4#
      • 1...Bxd7
        • 2.Qc3#
      • 1...Rxd7!
    • 1.Sfxd7+?
      • 1...Bxd7
        • 2.Qc3#
      • 1...Rxd7!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Qd5#
      • 1...Kxc6
        • 2.Qc4#
      • 1...Rxc6
        • 2.Sxd7#
      • 1...Bxc6
        • 2.Qc3#
      • 1...Sxc6
        • 2.Qxb5#
      • 1...dxc6
        • 2.Se6#
      • 1...Bc4
        • 2.Qb4#
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • B(d);OGATE,SBLOCK::QAB1(A)
    • B(d);XP(G)::S(J),XB(d)
    • B(d);N_GUARD::QAR2(A)
    • S(i);N_GUARD::QAR1(A),XB(d)
  • Tries
    • Try
      • S(J);CHECK,XP(k)
      • Vars
        • K(e);N_SPINB(f),N_SPINR(g),P-FLIGHT,P_SPINB(d)::QAR2(A)
        • B(d);XS(J)::QAR2(A)
      • Refutation
        • R(j);P_PINB(H),XS(J)
    • Try
      • S(K);CHECK,XP(k)
      • Vars
        • B(d);XS(K)::QAR2(A)
      • Refutation
        • R(j);P_PINB(H),XS(K)
  • Actual
    • S(J);
    • Threat
      • QAR1(A)
    • Vars
      • K(e);N_SPINB(f),N_SPINR(g),P-FLIGHT,P_SPINB(d),XS(J)::QAR2(A)
      • R(j);N_GUARD,SBLOCK,XS(J)::S(K),XP(k)
      • B(d);N_GUARD,XS(J)::QAR2(A)
      • S(i);N_GUARD,XS(J)::QAR1(A),XB(d)
      • P(k);N_GUARD,P_PINB(H),SBLOCK,XS(J)::S(K)
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