MESON Chess Problem Database

Problem Display
PID: 245486 (4B3/8/1K1N4/3kp3/7N/8/5Q2/8 w - - 0 1)

Shumarin, Vladimir Pavlovich

Kudesnik, 2001

4B3/8/1K1N4/3kp3/7N/8/5Q2/8

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Kc7?
      • threat
        • 2.Bf7#
      • 1...Ke6
        • 2.Qf7#
      • 1...e4!
    • 1.Bc6+?
      • 1...Kxd6
        • 2.Qf6#
      • 1...Ke6!
    • 1.Bd7?
      • threat
        • 2.Qc5#
        • 2.Qd2#
      • 1...e4
        • 2.Qc5#
      • 1...Kxd6!
    • 1.Qf5?
      • 1...Kxd6
        • 2.Qd7#
      • 1...Kd4!
    • 1.Qf6?
      • 1...e4
        • 2.Bc6#
        • 2.Bf7#
      • 1...Kd4!
    • 1.Qf7+?
      • 1...Kxd6
        • 2.Sf5#
        • 2.Qd7#
      • 1...Kd4!
  • Keys
    • 1.Qa2+!
      • 1...Kd4
        • 2.Qd2#
      • 1...Kxd6
        • 2.Sf5#

FEATURES

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