MESON Chess Problem Database

Problem Display
PID: 238170 (8/8/8/8/6K1/2Q5/2pp4/2Nk2N1 w - - 0 1)

Murashev, Pavel Aleksandrovich

Kudesnik, 2008

8/8/8/8/6K1/2Q5/2pp4/2Nk2N1

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc1
      • 2.Qa1#
  • Tries
    • 1.Qd4?
      • 1...Kxc1
        • 2.Qa1#
      • 1...Ke1!
    • 1.Qe5?
      • 1...Kxc1
        • 2.Qa1#
      • 1...dxc1Q
        • 2.Qe2#
      • 1...dxc1B
        • 2.Qe2#
      • 1...dxc1R
        • 2.Qe2#
      • 1...dxc1S!
    • 1.Qd3?
      • threat
        • 2.Qf1#
      • 1...Ke1
        • 2.Qe2#
      • 1...Kxc1!
    • 1.Qf3+?
      • 1...Ke1
        • 2.Sd3#
        • 2.Qe2#
      • 1...Kxc1!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Qxd2#
      • 1...Kxc1
        • 2.Qa1#
      • 1...dxc1Q
        • 2.Qe1#
      • 1...dxc1S
        • 2.Qe1#
        • 2.Qd2#
      • 1...dxc1B
        • 2.Qe1#
      • 1...dxc1R
        • 2.Qe1#
        • 2.Qd2#
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,P-FLIGHT,P_SPINP(b),XS(A)::QAR2(C)
  • Tries
    • Try
      • Q(C);P_PINP(c)
      • Vars
        • K(a);N_SPINP(c),OGATEB,P-FLIGHT,XS(A)::QAR2(C)
      • Refutation
        • K(a);N_SPINP(c),P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(A)::QAR2(C)
        • P(c);SBLOCK,XS(A)::QAB1(C)
      • Refutation
        • P(c);XS(A)
    • Try
      • Q(C);P_PINP(c)
      • Threat
        • QAR2(C)
      • Vars
        • K(a);N_SPINP(c),P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);N_SPINP(c),P-FLIGHT,XS(A)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);P-FLIGHT,XS(A)
  • Actual
    • S(B);
    • Threat
      • QAR1(C),XP(c)
    • Vars
      • K(a);OGATEB,P-FLIGHT,P_SPINP(b),XS(A)::QAR2(C)
      • P(c);OGATE,SBLOCK,XS(A)::QAR1(C)
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