MESON Chess Problem Database

Problem Display
PID: 223451 (8/3B4/8/2PkpNp1/3B4/P7/4K3/6Q1 w - - 0 1)

Steinmann, Wilhelm Friedrich Martin

Bruderschaft, 1886

8/3B4/8/2PkpNp1/3B4/P7/4K3/6Q1

#2

7 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...exd4
      • 2.Qxd4#
  • Tries
    • 1.Kd3?
      • threat
        • 2.Se3#
        • 2.Se7#
      • 1...exd4
        • 2.Qxd4#
      • 1...e4+!
    • 1.Se3+?
      • 1...Ke4
        • 2.Qg4#
      • 1...Kxd4!
    • 1.Se7+?
      • 1...Ke4
        • 2.Qe3#
        • 2.Qg4#
      • 1...Kc4!
    • 1.Bxe5?
      • threat
        • 2.Qd4#
      • 1...Ke4
        • 2.Qd4#
      • 1...Kxe5
        • 2.Qd4#
      • 1...Kc4!
  • Keys
    • 1.Qxg5!
      • 1...Kc4
        • 2.Qg8#
      • 1...Ke4
        • 2.Bc6#
      • 1...exd4
        • 2.Sd6#
      • 1...e4
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATE,XB(D)::QAR1(A),XP(b)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • P(b);OGATE,XB(D)::QAR1(A),XP(b)
      • Refutation
        • P(b);CHECK
    • Try
      • S(F);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT,XB(D)
    • Try
      • S(F);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(D);XP(b)
      • Threat
        • QAR1(A)
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);P-FLIGHT,XB(D)::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);XP(c)
    • Vars
      • K(a);S_FLIGHT::QAB(A)
      • K(a);S_FLIGHT::B(G)
      • P(b);SBLOCK,XB(D)::QAR(A)+S(F)
      • P(b);SBLOCK::QAB(A)
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