MESON Chess Problem Database

Problem Display
PID: 245522 (8/7K/8/8/1nN5/5Q2/2p5/2kB4 w - - 0 1)

Shumarin, Vladimir Pavlovich

Kudesnik, 2004

8/7K/8/8/1nN5/5Q2/2p5/2kB4

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qa3+?
      • 1...Kb1
        • 2.Sd2#
        • 2.Qb2#
      • 1...Kxd1!
    • 1.Qe3+?
      • 1...Kxd1
        • 2.Sb2#
        • 2.Qd2#
      • 1...Kb1!
    • 1.Qf4+?
      • 1...Kxd1
        • 2.Qd2#
        • 2.Qf1#
      • 1...Kb1!
    • 1.Qf6?
      • threat
        • 2.Qa1#
      • 1...Kb1
        • 2.Qb2#
      • 1...Kxd1
        • 2.Qf1#
      • 1...cxd1Q
        • 2.Qb2#
      • 1...cxd1B
        • 2.Qb2#
      • 1...cxd1R
        • 2.Qb2#
      • 1...cxd1S!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qa1#
      • 1...Kb1
        • 2.Qb2#
      • 1...Kxd1
        • 2.Qd2#

FEATURES

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