MESON Chess Problem Database

Problem Display
PID: 121319 (8/3K4/8/3pR1P1/Pp1k1pP1/1P3P2/2QP4/8 w - - 0 1)

van Dijk, Johannes

Der Reichsbote, 1900

8/3K4/8/3pR1P1/Pp1k1pP1/1P3P2/2QP4/8

#2

9 + 4

6490 yacpdb 2009
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qb1?
      • 1...Kc5
        • 2.Qg1#
      • 1...Kxe5!
    • 1.Qg6?
      • 1...Kxe5
        • 2.Qf6#
        • 2.Qg7#
      • 1...Kc5!
    • 1.Qh7?
      • 1...Kxe5
        • 2.Qg7#
        • 2.Qh8#
      • 1...Kc5!
    • 1.Qc4+?
      • 1...Kxe5
        • 2.d4#
      • 1...dxc4!
    • 1.Qc6?
      • threat
        • 2.Rxd5#
        • 2.Qxd5#
      • 1...Kxe5
        • 2.Qf6#
      • 1...Kd3!
    • 1.Qc8?
      • 1...Kxe5
        • 2.Qh8#
      • 1...Kd3!
  • Keys
    • 1.Qd1!
      • 1...Kd3
        • 2.Rxd5#
      • 1...Kc5
        • 2.Qg1#
      • 1...Kxe5
        • 2.d4#

This anticipates 92286(1921)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(b);P_SPINP(d),S_FLIGHT::QAB(A)
      • Refutation
        • K(b);S_FLIGHT,XR(G)
    • Try
      • Q(A);
      • Refutation
        • K(b);P_SPINP(d),S_FLIGHT
    • Try
      • Q(A);
      • Refutation
        • K(b);P_SPINP(d),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT,XR(G)::P(B)
      • Refutation
        • P(d);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);OGATEB,S_FLIGHT,XR(G)::QAB1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);OGATEB,S_FLIGHT,XR(G)::QAB(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);P-FLIGHT::R(G),XP(d)
      • K(b);P_SPINP(d),S_FLIGHT::QAB(A)
      • K(b);OGATE,S_FLIGHT,XR(G)::P(B)
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