MESON Chess Problem Database

Problem Display
PID: 118248 (8/8/8/8/kp6/N7/2P2K2/4B1Q1 w - - 0 1)

Pypa, Volodimir Iosifovich

Industrialnoje Zaporozie, 1967

8/8/8/8/kp6/N7/2P2K2/4B1Q1

#2

5 + 2

6490 yacpdb 2009
5454 Near Snap 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qf1?
      • threat
        • 2.Qa6#
      • 1...Ka5
        • 2.Qb5#
      • 1...Kxa3!
    • 1.Qg3?
      • 1...bxa3
        • 2.Qb3#
      • 1...b3
        • 2.Qxb3#
      • 1...Ka5!
    • 1.Qg5?
      • 1...bxa3
        • 2.Qa5#
      • 1...b3
        • 2.Qa5#
      • 1...Kxa3!
    • 1.Qg8?
      • threat
        • 2.Qa8#
      • 1...Kxa3
        • 2.Qb3#
      • 1...bxa3
        • 2.Qb3#
        • 2.Qc4#
        • 2.Qe8#
      • 1...Ka5!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qa7#
      • 1...Kxa3
        • 2.Qa1#
      • 1...Ka5
        • 2.Qa7#
      • 1...bxa3
        • 2.Qd7#

Anticipated by 224459(1887)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b)::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT,XS(E)
    • Try
      • Q(B);
      • Vars
        • P(b);XS(E)::QAB1(B)
        • P(b);::QAB1(B),XP(b)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • Q(B);
      • Vars
        • P(b);SBLOCK,XS(E)::QAR1(B)
        • P(b);::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT,XS(E)
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • K(a);P-FLIGHT,XS(E)::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
  • Actual
    • Q(B);
    • Threat
      • QAR(B)
    • Vars
      • K(a);OGATEB,P-FLIGHT,XS(E)::QAR2(B)
      • K(a);P-FLIGHT,P_SPINP(b)::QAR2(B)
      • P(b);SBLOCK,XS(E)::QAB(B)
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