MESON Chess Problem Database

Problem Display
PID: 110813 (K7/8/7R/8/8/4QP1b/4PR2/6k1 w - - 0 1)

Palkoska, Emil

64 Shakhmatnoe obozrenie, 1925

K7/8/7R/8/8/4QP1b/4PR2/6k1

#2

6 + 2

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kh1
      • 2.Qc1#
    • 1...Bf1
      • 2.Rfh2#
  • Tries
    • 1.Rf1+?
      • 1...Kg2
        • 2.Qg1#
        • 2.Qf2#
      • 1...Kh2
        • 2.Qg1#
        • 2.Qf2#
      • 1...Kxf1!
    • 1.Rg2+?
      • 1...Kf1
        • 2.Rg1#
        • 2.Qg1#
        • 2.Qf2#
      • 1...Kh1
        • 2.Qg1#
      • 1...Kxg2!
    • 1.Rh2+?
      • 1...Kf1
        • 2.Qc1#
        • 2.Qf2#
      • 1...Kxh2!
    • 1.Qc1+?
      • 1...Bf1
        • 2.Qxf1#
      • 1...Kxf2!
  • Keys
    • 1.f4!
      • 1...Bg2+
        • 2.Rf3#
      • 1...Kh1
        • 2.Qc1#
      • 1...Bf1
        • 2.Rfh2#
      • 1...Bg4
        • 2.Qg3#
      • 1...Bf5
        • 2.Qg3#
      • 1...Be6
        • 2.Qg3#
      • 1...Bd7
        • 2.Qg3#
      • 1...Bc8
        • 2.Qg3#

This anticipates 18279(1954)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT,P_SPINB(b)::QAR(C)
    • B(b);SBLOCK::QAB(C)+R(B)
  • Tries
    • Try
      • R(B);CHECK
      • Refutation
        • K(a);P-FLIGHT,XR(B)
    • Try
      • R(B);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINB(b)::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT,XR(B)
    • Try
      • R(B);CHECK
      • Refutation
        • K(a);P_SPINB(b),S_FLIGHT,XR(B)
    • Try
      • Q(C);CHECK
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::QAR1(C),XB(b)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
  • Actual
    • P(D);
    • Vars
      • B(b);CHECK,SBLOCK::QAB(C)+R(B)
      • K(a);P-FLIGHT,P_SPINB(b)::QAR(C)
      • B(b);SBLOCK::QAB(C)+R(B)
      • B(b);N_GUARD::QAR2(C)
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