MESON Chess Problem Database

Problem Display
PID: 214754 (8/2pN1p2/2Pp1P2/1p1k4/1p1N3K/1R2Pp2/8/7Q w - - 0 1)

Bell, Charles S

Detroit Free Press, 1877

8/2pN1p2/2Pp1P2/1p1k4/1p1N3K/1R2Pp2/8/7Q

#2

8 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qxf3#
  • Tries
    • 1.Kg3?
      • 1...Ke4
        • 2.Qxf3#
      • 1...Kc4!
    • 1.Kh3?
      • 1...Ke4
        • 2.Qxf3#
      • 1...Kc4!
    • 1.Kg4?
      • 1...Ke4
        • 2.Qxf3#
      • 1...Kc4!
    • 1.Kg5?
      • 1...Ke4
        • 2.Qxf3#
      • 1...Kc4!
    • 1.Kh5?
      • 1...Ke4
        • 2.Qxf3#
      • 1...Kc4!
    • 1.Rc3?
      • threat
        • 2.Qxf3#
      • 1...Ke4
        • 2.Qxf3#
      • 1...bxc3!
    • 1.Qf1?
      • 1...Ke4
        • 2.Qxf3#
      • 1...f2!
  • Keys
    • 1.Sxf3!
      • 1...Kc4
        • 2.Sd2#
      • 1...Ke4
        • 2.Sd4#
      • 1...Kxc6
        • 2.Sfe5#
      • 1...Ke6
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(d);S_FLIGHT::QAB1(A),XP(a)
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Vars
        • K(d);S_FLIGHT::QAB1(A),XP(a)
      • Refutation
        • K(d);N_SPINP(a),S_FLIGHT
    • Try
      • K(E);P-FLIGHT
      • Vars
        • K(d);S_FLIGHT::QAB1(A),XP(a)
      • Refutation
        • K(d);N_SPINP(a),S_FLIGHT
    • Try
      • K(E);P-FLIGHT
      • Vars
        • K(d);S_FLIGHT::QAB1(A),XP(a)
      • Refutation
        • K(d);N_SPINP(a),S_FLIGHT
    • Try
      • K(E);S_FLIGHT
      • Vars
        • K(d);S_FLIGHT::QAB1(A),XP(a)
      • Refutation
        • K(d);N_SPINP(a),S_FLIGHT
    • Try
      • K(E);P-FLIGHT
      • Vars
        • K(d);S_FLIGHT::QAB1(A),XP(a)
      • Refutation
        • K(d);N_SPINP(a),S_FLIGHT
    • Try
      • R(B);
      • Threat
        • QAB(A),XP(a)
      • Vars
        • K(d);S_FLIGHT::QAB1(A),XP(a)
      • Refutation
        • P(b);XR(B)
    • Try
      • Q(A);N_PINP(a)
      • Vars
        • K(d);S_FLIGHT::QAB1(A),XP(a)
      • Refutation
        • P(a);
  • Actual
    • S(D);XP(a)
    • Vars
      • K(d);S_FLIGHT::S(D)
      • K(d);S_FLIGHT::QAB(A)+S(D)
      • K(d);S_FLIGHT,XP(F)::QAB(A)+S(D),DCHECK
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