MESON Chess Problem Database

Problem Display
PID: 228857 (2B5/2pp3r/8/4pPR1/4k3/1P6/2K3P1/2QR4 w - - 0 1)

Bostrom, Ernst

Schackvarlden, 1926

2B5/2pp3r/8/4pPR1/4k3/1P6/2K3P1/2QR4

#2

8 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...d5
      • 2.Rg4#
    • 1...d6
      • 2.Rg4#
  • Tries
    • 1.Bb7+?
      • 1...d5
        • 2.Bxd5#
      • 1...c6!
    • 1.Bxd7?
      • threat
        • 2.Bc6#
        • 2.Rg4#
      • 1...Rh4
        • 2.Bc6#
      • 1...Rh6
        • 2.Rg4#
      • 1...Rg7
        • 2.Bc6#
      • 1...c6
        • 2.Bxc6#
        • 2.Rg4#
      • 1...Rxd7!
  • Keys
    • 1.Kd2!
      • threat
        • 2.Qc4#
      • 1...Kd4
        • 2.Qc4#
      • 1...Kf4
        • 2.Kd3#
      • 1...Kd5
        • 2.Ke3#
      • 1...d5
        • 2.Rg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(d);::R(G)
  • Tries
    • Try
      • B(H);CHECK
      • Vars
        • P(d);P_SPINP(d)::B(H),XP(d)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • B(H);XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • R(e);::B(H)
        • R(e);::R(G)
      • Refutation
        • R(e);XB(H)
  • Actual
    • K(C);P-FLIGHT
    • Threat
      • QAR2(A)
    • Vars
      • K(a);P-FLIGHT::QAR1(A)
      • K(a);P-FLIGHT::QAB(A)+K(C)
      • K(a);S_FLIGHT::R(B)+K(C)
      • P(d);SBLOCK::R(G)
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