MESON Chess Problem Database

Problem Display
PID: 105939 (R5bB/6Q1/1KN5/2p5/8/1krp4/8/b1R5 w - - 0 1)

Veders, Visvaldis M

Padomju Jaunatne, 1948

R5bB/6Q1/1KN5/2p5/8/1krp4/8/b1R5

#2

6 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kb2
      • 2.Qxc3#
    • 1...Kc4
      • 2.Qxg8#
  • Tries
    • 1.Rb1+?
      • 1...Kc4
        • 2.Qxg8#
      • 1...Bb2
        • 2.Qxc3#
      • 1...Kc2!
    • 1.Rxc3+?
      • 1...Bxc3
        • 2.Qxc3#
      • 1...Kb2!
    • 1.Ra3+?
      • 1...Kb2
        • 2.Qxc3#
      • 1...Kc4
        • 2.Qxg8#
      • 1...Kxa3!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Qa2#
      • 1...Kb2
        • 2.Qa3#
      • 1...Kc4
        • 2.Qa2#
      • 1...Rc2
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT,P_SPINR(c)::QAB1(D),XR(c)
    • K(b);P_SPINR(c),S_FLIGHT::QAB(D),XB(f)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB(D),XB(f)
        • B(a);P_SPINB(a)::QAR1(D),XR(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(A);CHECK,XR(c)
      • Vars
        • B(a);OGATE,XR(A)::QAR1(D),XB(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(E);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINR(c)::QAB1(D),XR(c)
        • K(b);P_SPINR(c),S_FLIGHT::QAB(D),XB(f)
      • Refutation
        • K(b);P-FLIGHT,XR(E)
  • Actual
    • Q(D);
    • Threat
      • QAB1(D)
    • Vars
      • K(b);P-FLIGHT,P_SPINR(c)::QAB1(D)
      • K(b);P_SPINR(c),S_FLIGHT::QAB(D)
      • R(c);::QAB1(D)
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