MESON Chess Problem Database

Problem Display
PID: 223456 (8/3p1p2/8/1K1k4/4pP2/2P5/6Q1/8 w - - 0 1)

Schram, Ferdinand

Bruderschaft, 1886

8/3p1p2/8/1K1k4/4pP2/2P5/6Q1/8

#2

4 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...d6
      • 2.Qa2#
  • Tries
    • 1.Qxe4+?
      • 1...Kd6
        • 2.Qe5#
      • 1...Kxe4!
    • 1.Qg5+?
      • 1...Kd6
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...f5!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qe5#
      • 1...Kd6
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...d6
        • 2.Qxf7#
      • 1...f6
        • 2.Qxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAB(A)
  • Tries
    • Try
      • Q(A);CHECK,XP(a)
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK,N_PINP(a)
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
        • K(b);S_FLIGHT::QAR1(A)
      • Refutation
        • P(d);P_SPINP(d)
  • Actual
    • Q(A);N_PINP(a)
    • Threat
      • QAR1(A)
    • Vars
      • K(b);P-FLIGHT::QAB1(A)
      • K(b);S_FLIGHT::QAR1(A)
      • P(c);SBLOCK::QAB(A),XP(d)
      • P(d);OGATE::QAR2(A),XP(c)
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