MESON Chess Problem Database

Problem Display
PID: 206908 (8/3B4/8/k1P5/1N6/2b5/2KB4/6Q1 w - - 0 1)

Whitner, HK

Philadelphia Times, 1822

8/3B4/8/k1P5/1N6/2b5/2KB4/6Q1

#2

6 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ba1
      • 2.Qxa1#
    • 1...Bxb4
      • 2.Qa1#
  • Tries
    • 1.Qe3?
      • 1...Kxb4
        • 2.Qxc3#
      • 1...Bxd2
        • 2.Qa3#
      • 1...Bxb4
        • 2.Qa3#
      • 1...Ba1
        • 2.Qa3#
      • 1...Bd4
        • 2.Qa3#
      • 1...Be5
        • 2.Qa3#
      • 1...Bf6
        • 2.Qa3#
      • 1...Bg7
        • 2.Qa3#
      • 1...Bh8
        • 2.Qa3#
      • 1...Bb2!
    • 1.Qa1+?
      • 1...Kxb4
        • 2.Qxc3#
      • 1...Bxa1!
  • Keys
    • 1.Qg3!
      • 1...Kxb4
        • 2.Qxc3#
      • 1...Bxd2
        • 2.Qa3#
      • 1...Bxb4
        • 2.Qa3#
      • 1...Bb2
        • 2.Qc7#
      • 1...Ba1
        • 2.Qc7#
        • 2.Qa3#
      • 1...Bd4
        • 2.Qc7#
        • 2.Qa3#
      • 1...Be5
        • 2.Qa3#
      • 1...Bf6
        • 2.Qc7#
        • 2.Qa3#
      • 1...Bg7
        • 2.Qc7#
        • 2.Qa3#
      • 1...Bh8
        • 2.Qc7#
        • 2.Qa3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD::QAR(A),XB(a)
    • B(a);N_GUARD,P_SPINB(a),XS(D)::QAR(A)
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(b);OGATEB,P_SPINB(a),S_FLIGHT,XS(D)::QAB1(A),XB(a)
        • B(a);OGATE,XB(C)::QAR2(A)
        • B(a);OGATE,P_SPINB(a),XS(D)::QAR2(A)
        • B(a);OGATE::QAR2(A)
      • Refutation
        • B(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATEB,P_SPINB(a),S_FLIGHT,XS(D)::QAB1(A),XB(a)
      • Refutation
        • B(a);XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(b);OGATEB,P_SPINB(a),S_FLIGHT,XS(D)::QAB1(A),XB(a)
      • B(a);OGATE,XB(C)::QAR2(A)
      • B(a);OGATE,P_SPINB(a),XS(D)::QAR2(A)
      • B(a);::QAB(A)
      • B(a);OGATE::QAR2(A)
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