MESON Chess Problem Database

Problem Display
PID: 240471 (8/8/3p4/3K4/2Q5/kN6/b7/3B4 w - - 0 1)

Parkhomenko, Nikolai A

64 Shakhmatnoe obozrenie, 2013

8/8/3p4/3K4/2Q5/kN6/b7/3B4

#2

4 + 3

15148 Sadier Collection 2021
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kb2
      • 2.Qc1#
    • 1...Bxb3
      • 2.Qxb3#
  • Tries
    • 1.Kxd6?
      • 1...Kb2
        • 2.Qc1#
      • 1...Bxb3
        • 2.Qxb3#
      • 1...Bb1!
    • 1.Qa6+?
      • 1...Kb4
        • 2.Qa5#
      • 1...Kb2!
    • 1.Qc5+?
      • 1...Kb2
        • 2.Qc1#
      • 1...Ka4
        • 2.Qa5#
      • 1...dxc5!
  • Keys
    • 1.Qc3!
      • 1...Bxb3+
        • 2.Qxb3#
      • 1...Ka4
        • 2.Qa5#
      • 1...Bb1
        • 2.Sc1#

Anticipated by 121123(1958)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(b);S_FLIGHT::QAB1(C)
    • B(a);OGATE,P_PINQ(C),XS(B)::QAR1(C),XB(a)
  • Tries
    • Try
      • K(D);P-FLIGHT,XP(c)
      • Vars
        • K(b);S_FLIGHT::QAB1(C)
        • B(a);OGATE,XS(B)::QAR1(C),XB(a)
      • Refutation
        • B(a);
    • Try
      • Q(C);CHECK,P_SPINS(B)
      • Vars
        • K(b);S_FLIGHT::QAB1(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);CHECK,P_SPINS(B)
      • Vars
        • K(b);S_FLIGHT::QAB1(C)
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • P(c);XQ(C)
  • Actual
    • Q(C);P_SPINS(B)
    • Vars
      • B(a);CHECK,OGATE,P_SPINB(a),XS(B)::QAR1(C),XB(a)
      • K(b);P-FLIGHT::QAR1(C)
      • B(a);N_PINS(B)::QAR(C)+S(B)
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