MESON Chess Problem Database

Problem Display
PID: 161524 (8/8/3Q4/ppp5/1k1N4/8/1K6/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Bankovskaya gazeta, 1996

8/8/3Q4/ppp5/1k1N4/8/1K6/8

#2

3 + 4

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Tries
    • 1.Sc6+?
      • 1...Ka4
        • 2.Qd1#
      • 1...Kc4!
    • 1.Qxc5+?
      • 1...Ka4
        • 2.Qa3#
        • 2.Qxb5#
      • 1...Kxc5!
    • 1.Qb6?
      • threat
        • 2.Qxb5#
      • 1...Ka4
        • 2.Qxb5#
      • 1...cxd4
        • 2.Qxd4#
      • 1...Kc4!
    • 1.Qd7?
      • threat
        • 2.Qxb5#
      • 1...Ka4
        • 2.Qxb5#
      • 1...cxd4
        • 2.Qxd4#
      • 1...Kc4!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qb3#
      • 1...Ka4
        • 2.Qb3#
      • 1...cxd4
        • 2.Qxd4#
      • 1...a4
        • 2.Sc6#
      • 1...c4
        • 2.Qxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(a);N_SPINP(d),P-FLIGHT::QAB(C)
      • Refutation
        • K(a);N_SPINP(d),P-FLIGHT
    • Try
      • Q(C);CHECK,XP(d)
      • Refutation
        • K(a);S_FLIGHT,XQ(C)
    • Try
      • Q(C);N_PINP(d),P_PINP(c)
      • Threat
        • QAR1(C),XP(c)
      • Vars
        • K(a);N_SPINP(c),P-FLIGHT::QAB1(C),XP(c)
        • P(d);OGATE,XS(B)::QAR2(C),XP(d)
      • Refutation
        • K(a);N_SPINP(c),P-FLIGHT
    • Try
      • Q(C);N_PINP(d)
      • Threat
        • QAR1(C),XP(c)
      • Vars
        • K(a);P-FLIGHT,P_SPINP(c)::QAB1(C),XP(c)
        • P(d);OGATE,XS(B)::QAR2(C),XP(d)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(C);N_PINP(d)
    • Threat
      • QAR1(C)
    • Vars
      • K(a);P-FLIGHT::QAB1(C)
      • P(d);OGATE,XS(B)::QAR2(C),XP(d)
      • P(b);SBLOCK::S(B)
      • P(d);OGATE::QAR1(C),XP(c)
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