MESON Chess Problem Database

Problem Display
PID: 229150 (1brk3K/q1R1R3/3Pp3/4p3/3Q4/8/8/8 w - - 0 1)

ten Cate, Pieter

Allgemeine Zeitung Chemnitz, 1926

1brk3K/q1R1R3/3Pp3/4p3/3Q4/8/8/8

#2

5 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4
      • 2.Rcd7#
    • 1...Qc5
      • 2.Rcd7#
    • 1...Qb6
      • 2.Rcd7#
    • 1...Qa1
      • 2.Rcd7#
    • 1...Qa2
      • 2.Rcd7#
    • 1...Qa3
      • 2.Rcd7#
    • 1...Qa5
      • 2.Rcd7#
    • 1...Qa6
      • 2.Rcd7#
    • 1...Qa8
      • 2.Rcd7#
  • Tries
    • 1.Qg1?
      • threat
        • 2.Qg8#
      • 1...Qxg1
        • 2.Rcd7#
      • 1...Qf2
        • 2.Rcd7#
      • 1...Qa4!
    • 1.Qf2?
      • threat
        • 2.Qf8#
      • 1...Qxf2
        • 2.Rcd7#
      • 1...Qa4!
    • 1.Qa4?
      • threat
        • 2.Re8#
        • 2.Qd7#
        • 2.Qe8#
      • 1...Qxc7
        • 2.Re8#
        • 2.Qe8#
      • 1...Rxc7
        • 2.Re8#
        • 2.Qe8#
      • 1...Qxa4!
    • 1.Qg4?
      • threat
        • 2.Qg8#
      • 1...Qg1
        • 2.Rcd7#
      • 1...Qf2
        • 2.Rcd7#
      • 1...Qa4!
  • Keys
    • 1.d7!
      • threat
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Kxc7+
        • 2.d8S#
      • 1...Kxe7+
        • 2.d8Q#
      • 1...Qxd4
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Qxc7
        • 2.Re8#
      • 1...Rxc7
        • 2.Re8#
      • 1...Bxc7
        • 2.Re8#
      • 1...exd4
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Qa4
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Qc5
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Qb6
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Qa1
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Qa2
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Qa3
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Qa5
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Qa6
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Qb7
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Qa8
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...e4
        • 2.dxc8Q#
        • 2.dxc8R#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 9
  • Sets
    • Q(c);N_GUARD,XQ(A)::R1(C)
    • Q(c);N_GUARD::R1(C)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • Q(c);N_GUARD,XQ(A)::R1(C)
        • Q(c);N_GUARD::R1(C)
      • Refutation
        • Q(c);
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • Q(c);N_GUARD,XQ(A)::R1(C)
      • Refutation
        • Q(c);
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Refutation
        • Q(c);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • Q(c);N_GUARD::R1(C)
      • Refutation
        • Q(c);
  • Actual
    • P(B);
    • Threat
      • PXR(e)=Q
    • Vars
      • K(f);CHECK,OGATE,S_FLIGHT,XR(C)::P=S
      • K(f);CHECK,OGATE,S_FLIGHT,XR(D)::P=Q
      • Q(c);XQ(A)::PXR(e)=Q
      • Q(c);SBLOCK,XR(C)::R1(D)
      • R(e);SBLOCK,XR(C)::R1(D)
      • B(d);SBLOCK,XR(C)::R1(D)
      • P(a);XQ(A)::PXR(e)=Q
      • Q(c);::PXR(e)=Q
      • P(a);::PXR(e)=Q
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