MESON Chess Problem Database

Problem Display
PID: 177842 (b7/7n/7Q/5Kp1/1pPPp3/4kP2/5R2/BN3B1N w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Sahs (Latvia), 1983

b7/7n/7Q/5Kp1/1pPPp3/4kP2/5R2/BN3B1N

#2

10 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sf6
      • 2.Qxg5#
    • 1...Sf8
      • 2.Qxg5#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Sd1#
      • 1...Kxd4
        • 2.Qb6#
      • 1...bxc3!
    • 1.Re2+?
      • 1...Kxf3
        • 2.Sd2#
        • 2.Qh3#
      • 1...Kd3!
    • 1.Qh3?
      • threat
        • 2.fxe4#
        • 2.f4#
      • 1...g4
        • 2.fxg4#
      • 1...exf3!
    • 1.f4?
      • threat
        • 2.Qh3#
      • 1...gxf4
        • 2.Qxf4#
      • 1...g4!
    • 1.d5?
      • threat
        • 2.Qb6#
      • 1...Sf6
        • 2.Qxg5#
      • 1...Bc6!
  • Keys
    • 1.Rb2!
      • threat
        • 2.Rb3#
      • 1...Kxf3
        • 2.Qh3#
      • 1...Kxd4
        • 2.Qb6#
      • 1...b3
        • 2.Rxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(e);N_GUARD::QAB(J),XP(d)
  • Tries
    • Try
      • S(B);
      • Threat
        • S(B)
      • Vars
        • K(a);N_SPINP(d),OGATEB,S_FLIGHT,XP(H)::QAB(J)
      • Refutation
        • P(b);XS(B)
    • Try
      • R(E);CHECK
      • Refutation
        • K(a);N_SPINP(d),P-FLIGHT
    • Try
      • Q(J);N_PINP(d)
      • Threat
        • DUALS(2)
      • Vars
        • P(d);OGATE::QAR(J)+P(F),XP(d)
      • Refutation
        • P(c);P_SPINP(c),XP(F)
    • Try
      • P(F);N_PINP(d)
      • Threat
        • QAR(J)
      • Vars
        • P(d);OGATE,P_SPINP(d),XP(F)::QAB1(J),XP(d)
      • Refutation
        • P(d);
    • Try
      • P(H);
      • Threat
        • QAB(J)
      • Vars
        • S(e);N_GUARD::QAB(J),XP(d)
      • Refutation
        • B(f);
  • Actual
    • R(E);
    • Threat
      • R(E)
    • Vars
      • K(a);N_SPINP(d),OGATEB,P-FLIGHT,XP(F)::QAR2(J)
      • K(a);N_SPINP(d),OGATEB,S_FLIGHT,XP(H)::QAB(J)
      • P(b);::R(E),XP(b)
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