MESON Chess Problem Database

Problem Display
PID: 53604 (2BN4/3P2np/2K3bR/2p2kp1/2Q5/8/6N1/8 w - - 0 1)

Thayer, Harold

The Chess Review, 1934

2BN4/3P2np/2K3bR/2p2kp1/2Q5/8/6N1/8

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Sh5
      • 2.Qe6#
    • 1...Se6
      • 2.Qxe6#
    • 1...Se8
      • 2.Qe6#
    • 1...g4
      • 2.Qf4#
  • Tries
    • 1.Qd4?
      • threat
        • 2.Se3#
      • 1...g4
        • 2.Qf4#
      • 1...cxd4!
  • Keys
    • 1.Kd6!
      • 1...Se8+
        • 2.dxe8S#
      • 1...Kf6
        • 2.Qf7#
      • 1...g4
        • 2.Qf4#
      • 1...Bh5
        • 2.Se3#
      • 1...Bf7
        • 2.Se3#
      • 1...Be8
        • 2.Se3#
      • 1...Sh5
        • 2.Qe6#
      • 1...Se6
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(e);N_GUARD::QAB1(B)
    • S(e);N_GUARD::QAB1(B),XS(e)
    • P(c);N_GUARD::QAR1(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • S(A)
      • Vars
        • P(c);N_GUARD::QAR1(B)
      • Refutation
        • P(a);XQ(B)
  • Actual
    • K(C);P-FLIGHT
    • Vars
      • S(e);CHECK,OGATE::PXS(e)=S
      • K(b);P-FLIGHT,P_SPINB(d)::QAR1(B)
      • P(c);N_GUARD::QAR1(B)
      • B(d);::S(A)
      • S(e);N_GUARD::QAB1(B)
      • S(e);N_GUARD::QAB1(B),XS(e)
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