MESON Chess Problem Database

Problem Display
PID: 105465 (8/rp6/kp1Q4/8/P1K5/8/8/8 w - - 0 1)

Pypa, Volodimir Iosifovich

Leninska plemya, 1987

8/rp6/kp1Q4/8/P1K5/8/8/8

#2

3 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qb4?
      • threat
        • 2.Qb5#
      • 1...b5+
        • 2.Qxb5#
      • 1...Ra8!
    • 1.Qe5?
      • threat
        • 2.Qb5#
      • 1...b5+
        • 2.Qxb5#
      • 1...Ra8!
    • 1.Qb8?
      • 1...Ka5
        • 2.Qxa7#
      • 1...Ra8
        • 2.Qxa8#
      • 1...b5+!
    • 1.Qd5?
      • threat
        • 2.Qb5#
      • 1...b5+
        • 2.Qxb5#
      • 1...Ra8!
    • 1.Qd7?
      • threat
        • 2.Qb5#
      • 1...b5+
        • 2.Qxb5#
      • 1...Ka5
        • 2.Qb5#
      • 1...Ra8!
    • 1.Qd8?
      • 1...b5+
        • 2.axb5#
      • 1...Ra8
        • 2.Qxa8#
      • 1...Ka5!
  • Keys
    • 1.a5!
      • threat
        • 2.Qxb6#
      • 1...Kxa5
        • 2.Qa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);N_PINP(b)
      • Threat
        • QAB1(C)
      • Vars
        • P(b);CHECK::QAB1(C),XP(b)
      • Refutation
        • R(c);
    • Try
      • Q(C);N_PINP(b)
      • Threat
        • QAB1(C)
      • Vars
        • P(b);CHECK::QAB1(C),XP(b)
      • Refutation
        • R(c);
    • Try
      • Q(C);N_PINP(b)
      • Vars
        • K(a);P-FLIGHT::QAR2(C),XR(c)
        • R(c);OGATEB::QAR2(C),XR(c)
      • Refutation
        • P(b);CHECK
    • Try
      • Q(C);N_PINP(b)
      • Threat
        • QAB1(C)
      • Vars
        • P(b);CHECK::QAB1(C),XP(b)
      • Refutation
        • R(c);
    • Try
      • Q(C);N_PINP(b)
      • Threat
        • QAB1(C)
      • Vars
        • P(b);CHECK::QAB1(C),XP(b)
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • R(c);
    • Try
      • Q(C);N_PINP(b)
      • Vars
        • P(b);CHECK,OGATE::P(A),XP(b)
        • R(c);OGATEB::QAR2(C),XR(c)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
  • Actual
    • P(A);
    • Threat
      • QAR1(C),XP(b)
    • Vars
      • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XP(A)::QAR2(C)
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