MESON Chess Problem Database

Problem Display
PID: 222512 (8/8/2ppp2N/3kp3/8/N1P1P3/3K1B2/6Q1 w - - 0 1)

Bennett, Emerson

Philadelphia Times, 1884

8/8/2ppp2N/3kp3/8/N1P1P3/3K1B2/6Q1

#2

7 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qh1#
      • 2.Qg2#
    • 1...Kc5
      • 2.e4#
  • Tries
    • 1.Qb1?
      • threat
        • 2.e4#
      • 1...Kc5
        • 2.e4#
      • 1...c5
        • 2.Qb7#
      • 1...e4!
    • 1.Qh1+?
      • 1...Kc5
        • 2.e4#
      • 1...e4!
    • 1.Qg2+?
      • 1...Kc5
        • 2.e4#
      • 1...e4!
    • 1.Qg5?
      • 1...Ke4
        • 2.Qg2#
      • 1...Kc5
        • 2.e4#
      • 1...c5!
    • 1.Qg8?
      • 1...Ke4
        • 2.Qg2#
      • 1...Kc5
        • 2.e4#
      • 1...c5
        • 2.Qa8#
      • 1...e4!
    • 1.c4+?
      • 1...Ke4
        • 2.Qh1#
        • 2.Qg2#
        • 2.Qg4#
      • 1...Kc5!
  • Keys
    • 1.Qg7!
      • 1...Ke4
        • 2.Qg2#
      • 1...Kc5
        • 2.e4#
      • 1...e4
        • 2.Qd4#
      • 1...c5
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::B(C)+P(F)
  • Tries
    • Try
      • Q(A);
      • Threat
        • P(F)
      • Vars
        • K(a);P-FLIGHT::B(C)+P(F)
        • P(c);OGATEB,SBLOCK::QAB(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::B(C)+P(F)
      • Refutation
        • P(b);P_SPINP(b)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::B(C)+P(F)
      • Refutation
        • P(b);P_SPINP(b)
    • Try
      • Q(A);P_PINP(b)
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB(A)
        • K(a);P-FLIGHT::B(C)+P(F)
      • Refutation
        • P(c);
    • Try
      • Q(A);P_PINP(e)
      • Vars
        • K(a);N_SPINP(e),S_FLIGHT::QAB(A)
        • K(a);N_SPINP(e),P-FLIGHT::B(C)+P(F)
        • P(c);OGATEB,SBLOCK::QAB(A)
      • Refutation
        • P(b);
    • Try
      • P(E);CHECK
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::QAB(A)
      • K(a);P-FLIGHT::B(C)+P(F)
      • P(b);OGATE::QAR1(A)
      • P(c);OGATEB,SBLOCK::QAB(A)
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