MESON Chess Problem Database

Problem Display
PID: 164584 (8/8/8/8/8/6pQ/6pN/3K2k1 w - - 0 1)

Dubina, A

Sachmatija, 2007

8/8/8/8/8/6pQ/6pN/3K2k1

#2

3 + 3

5454 Near Snap 2017
3713 Snap 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Kh1
      • 2.Sf3#
  • Tries
    • 1.Ke1?
      • threat
        • 2.Sf3#
      • 1...Kh1
        • 2.Sf3#
      • 1...gxh2!
    • 1.Ke2?
      • threat
        • 2.Sf3#
      • 1...Kh1
        • 2.Sf3#
      • 1...gxh2!
    • 1.Qh5?
      • 1...Kh1
        • 2.Sf3#
      • 1...Kf2
        • 2.Qc5#
      • 1...gxh2!
    • 1.Qh6?
      • 1...Kh1
        • 2.Sf3#
      • 1...Kf2
        • 2.Qb6#
      • 1...gxh2!
    • 1.Qh7?
      • 1...Kh1
        • 2.Sf3#
      • 1...Kf2
        • 2.Qa7#
      • 1...gxh2!
    • 1.Qh8?
      • 1...Kh1
        • 2.Sf3#
      • 1...Kf2
        • 2.Qd4#
      • 1...gxh2!
  • Keys
    • 1.Qh4!
      • 1...Kh1
        • 2.Sf3#
      • 1...Kf2
        • 2.Qd4#
      • 1...gxh2
        • 2.Qe1#

Anticipated by 9316(1876), 208783(1876), 248226(1880), 182373(1906), 80835(1928), 178142(1959), 79327(1960), 67025(2001)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR(C)+S(B)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • S(B)
      • Vars
        • K(a);P-FLIGHT::QAR(C)+S(B)
      • Refutation
        • P(c);XS(B)
    • Try
      • K(A);S_FLIGHT
      • Threat
        • S(B)
      • Vars
        • K(a);P-FLIGHT::QAR(C)+S(B)
      • Refutation
        • P(c);XS(B)
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAR(C)+S(B)
        • K(a);S_FLIGHT::QAB(C)
      • Refutation
        • P(c);XS(B)
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAR(C)+S(B)
        • K(a);S_FLIGHT::QAB(C)
      • Refutation
        • P(c);XS(B)
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAR(C)+S(B)
        • K(a);S_FLIGHT::QAB(C)
      • Refutation
        • P(c);XS(B)
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAR(C)+S(B)
        • K(a);S_FLIGHT::QAB(C)
      • Refutation
        • P(c);XS(B)
  • Actual
    • Q(C);
    • Vars
      • K(a);P-FLIGHT::QAR(C)+S(B)
      • K(a);P_SPINP(c),S_FLIGHT::QAB(C)
      • P(c);OGATE,SBLOCK,XS(B)::QAR2(C)
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