MESON Chess Problem Database

Problem Display
PID: 187932 (4k2r/R4N2/8/4B3/8/K6b/6P1/7Q w - - 0 1)

van Dijk, Johannes

Source?, 1910

4k2r/R4N2/8/4B3/8/K6b/6P1/7Q

#2

6 + 3

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bxg2
      • 2.Qxh8#
    • 1...Bg4
      • 2.Qxh8#
    • 1...Bf5
      • 2.Qxh8#
    • 1...Be6
      • 2.Qxh8#
    • 1...Bc8
      • 2.Qxh8#
  • Tries
    • 1.Sd6+?
      • 1...Kd8
        • 2.Bf6#
      • 1...Kf8!
    • 1.Qd1?
      • threat
        • 2.Qd8#
      • 1...Kf8
        • 2.Qd8#
      • 1...Bd7!
    • 1.Qxh3?
      • threat
        • 2.Qc8#
        • 2.Qxh8#
      • 1...Kf8
        • 2.Qc8#
        • 2.Qxh8#
      • 1...Rh4
        • 2.Qc8#
      • 1...Rh5
        • 2.Qc8#
      • 1...Rh6
        • 2.Qc8#
      • 1...Rh7
        • 2.Qc8#
      • 1...Rf8
        • 2.Qe6#
        • 2.Qd7#
        • 2.Qc8#
      • 1...Rg8
        • 2.Qc8#
      • 1...Rxh3+!
    • 1.gxh3?
      • threat
        • 2.Qa8#
      • 1...Kf8
        • 2.Qa8#
      • 1...Rxh3+!
  • Keys
    • 1.g4!
      • threat
        • 2.Qa8#
      • 1...Kf8
        • 2.Qa8#
      • 1...Bxg4
        • 2.Qxh8#
      • 1...Bg2
        • 2.Qxh8#

FEATURES

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