MESON Chess Problem Database

Problem Display
PID: 178250 (2Q1K3/8/1B6/8/8/3p4/4NN2/3Bk3 w - - 0 1)

Stojnic, Dragan

Vratnica-64, 2009

2Q1K3/8/1B6/8/8/3p4/4NN2/3Bk3

#2

6 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kd2
      • 2.Qc3#
  • Tries
    • 1.Sg3?
      • 1...d2
        • 2.Qe6#
      • 1...Kd2!
    • 1.Sxd3+?
      • 1...Kf1
        • 2.Qh3#
      • 1...Kd2
        • 2.Qc2#
      • 1...Kxd1!
    • 1.Qh3?
      • 1...Kd2
        • 2.Ba5#
      • 1...d2
        • 2.Qh1#
      • 1...dxe2!
    • 1.Qe6?
      • 1...Kd2
        • 2.Ba5#
      • 1...dxe2
        • 2.Qxe2#
      • 1...d2
        • 2.Sg3#
      • 1...Kf1!
    • 1.Qc6?
      • 1...Kf1
        • 2.Qh1#
      • 1...Kd2
        • 2.Qc3#
      • 1...d2
        • 2.Qh1#
      • 1...dxe2!
    • 1.Qa8?
      • 1...Kf1
        • 2.Qh1#
      • 1...Kd2
        • 2.Qa5#
      • 1...d2
        • 2.Qh1#
      • 1...dxe2!
  • Keys
    • 1.Qg4!
      • 1...Kf1
        • 2.Qg1#
      • 1...Kd2
        • 2.Qb4#
      • 1...dxe2
        • 2.Qxe2#
      • 1...d2
        • 2.Qg1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB1(E)
  • Tries
    • Try
      • S(B);
      • Vars
        • P(b);SBLOCK::QAR(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);CHECK,XP(b)
      • Vars
        • K(a);P-FLIGHT::QAB(E)
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT,XB(A)
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::B(D)
        • P(b);SBLOCK::QAR(E)
      • Refutation
        • P(b);XS(B)
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::B(D)
        • P(b);OGATE,P_SPINP(b),XS(B)::QAR1(E),XP(b)
        • P(b);SBLOCK::QAR(E)+S(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);P-FLIGHT::QAR2(E)
        • K(a);S_FLIGHT::QAB1(E)
        • P(b);SBLOCK::QAR(E)
      • Refutation
        • P(b);XS(B)
    • Try
      • Q(E);
      • Vars
        • K(a);P-FLIGHT::QAR2(E)
        • K(a);S_FLIGHT::QAB(E)
        • P(b);SBLOCK::QAR(E)
      • Refutation
        • P(b);XS(B)
  • Actual
    • Q(E);
    • Vars
      • K(a);P-FLIGHT::QAR1(E)
      • K(a);S_FLIGHT::QAB(E)
      • P(b);OGATE,XS(B)::QAR1(E),XP(b)
      • P(b);SBLOCK::QAR2(E)
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