MESON Chess Problem Database

Problem Display
PID: 189548 (1b5r/1pk4p/rp1R1P1K/p7/7B/7B/7Q/8 w - - 0 1)

van Dijk, Johannes

Alkmaarsche Courant, 1911

1b5r/1pk4p/rp1R1P1K/p7/7B/7B/7Q/8

#2

6 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Rxb6+?
      • 1...Kd8
        • 2.Qxb8#
        • 2.f7#
      • 1...Kxb6!
    • 1.Rc6+?
      • 1...Kd8
        • 2.Rc8#
        • 2.Qxb8#
        • 2.f7#
      • 1...Kxc6!
    • 1.Rd7+?
      • 1...Kc8
        • 2.Rd1#
        • 2.Rd2#
        • 2.Rd3#
        • 2.Rd4#
        • 2.Rd5#
      • 1...Kc6!
    • 1.Rd8+?
      • 1...Kxd8
        • 2.Qxb8#
        • 2.f7#
      • 1...Kc6!
  • Keys
    • 1.f7!
      • threat
        • 2.Rg6#
      • 1...Rd8
        • 2.Bxd8#
      • 1...Re8
        • 2.fxe8S#
      • 1...b5
        • 2.Rxa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(D);CHECK,XP(c)
      • Refutation
        • K(e);S_FLIGHT,XR(D)
    • Try
      • R(D);CHECK
      • Refutation
        • K(e);P-FLIGHT,XR(D)
    • Try
      • R(D);CHECK
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • R(D);CHECK
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • P(E);
    • Threat
      • QAB(A)+R(D)
    • Vars
      • R(h);N_GUARD::B(C),XR(h)
      • R(h);OGATE::PXR(h)=S
      • P(c);OGATE,P_PINR(D)::QAB(A)+R(D),XR(b)
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