MESON Chess Problem Database

Problem Display
PID: 134347 (8/8/Q7/8/2p1K3/8/5NR1/3Bk3 w - - 0 1)

Markovtsy, Vassyl Yuriovich

The Problemist, 2009

8/8/Q7/8/2p1K3/8/5NR1/3Bk3

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...c3
      • 2.Qe2#
  • Tries
    • 1.Sh1?
      • 1...Kxd1
        • 2.Qa1#
      • 1...c3
        • 2.Qe2#
      • 1...Kf1!
    • 1.Sg4?
      • 1...Kxd1
        • 2.Qa1#
      • 1...c3
        • 2.Qe2#
      • 1...Kf1!
    • 1.Bf3?
      • 1...Kf1
        • 2.Qa1#
      • 1...c3
        • 2.Qe2#
      • 1...Kd2!
    • 1.Rg1+?
      • 1...Kxf2
        • 2.Qb6#
        • 2.Qa7#
      • 1...Kd2!
    • 1.Qa1?
      • 1...Kf1
        • 2.Bf3#
      • 1...Kd2
        • 2.Sd3#
      • 1...c3!
    • 1.Qh6?
      • 1...Kf1
        • 2.Qh1#
      • 1...c3!
  • Keys
    • 1.Sh3!
      • 1...Kxd1
        • 2.Qa1#
      • 1...Kf1
        • 2.Rg1#
      • 1...c3
        • 2.Qe2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATE::QAR1(E)
  • Tries
    • Try
      • S(B);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XB(A)::QAR(E)
        • P(b);OGATE::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • S(B);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XB(A)::QAR(E)
        • P(b);OGATE::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • B(A);
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b)::QAR(E)
        • P(b);OGATE::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(C);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);P-FLIGHT::QAR(E)+B(A)
        • K(a);S_FLIGHT::R(C)+S(B)
      • Refutation
        • P(b);
    • Try
      • Q(E);
      • Vars
        • K(a);P-FLIGHT::QAR2(E)
      • Refutation
        • P(b);
  • Actual
    • S(B);
    • Vars
      • K(a);OGATEB,P-FLIGHT,XB(A)::QAR(E)
      • K(a);P-FLIGHT,P_SPINP(b)::R1(C)
      • P(b);OGATE::QAR1(E)
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