MESON Chess Problem Database

Problem Display
PID: 28813 (6Q1/4Kp2/3Pp2P/2pR1P2/3pkN2/1P1R4/2P1N1br/8 w - - 0 1)

Erokhin, Vladimir Alekseevich

Comm., Komsomolets, 1985

6Q1/4Kp2/3Pp2P/2pR1P2/3pkN2/1P1R4/2P1N1br/8

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Qxg2#
    • 1...Rh4
      • 2.Qxg2#
    • 1...Rh5
      • 2.Qxg2#
    • 1...Rxh6
      • 2.Qxg2#
    • 1...f6
      • 2.Qxe6#
  • Tries
    • 1.Kf6?
      • threat
        • 2.Re5#
      • 1...exd5
        • 2.Qe8#
      • 1...e5
        • 2.Rxe5#
      • 1...Rxh6+!
    • 1.Sc3+?
      • 1...Kxf4
        • 2.Qg3#
      • 1...dxc3!
    • 1.Qg4?
      • threat
        • 2.Sg3#
      • 1...exd5
        • 2.Sg6#
      • 1...Rh3!
    • 1.Qa8?
      • threat
        • 2.Rxc5#
      • 1...exd5
        • 2.Qxd5#
      • 1...c4
        • 2.Ra5#
        • 2.Rb5#
        • 2.Rc5#
      • 1...e5!
  • Keys
    • 1.Sg6!
      • threat
        • 2.Re5#
      • 1...Kxd5
        • 2.Qa8#
      • 1...exd5
        • 2.Sg3#
      • 1...fxg6
        • 2.Qxe6#
      • 1...e5
        • 2.Rxe5#
      • 1...f6
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • R(b);N_GUARD::QAB(K),XB(a)
    • R(b);N_GUARD,XP(I)::QAB(K),XB(a)
    • P(g);OGATE::QAR2(K),XP(f)
  • Tries
    • Try
      • K(J);S_FLIGHT
      • Threat
        • R1(F)
      • Vars
        • P(f);OGATEB,XR(F)::QAR(K)
        • P(f);::R1(F),XP(f)
      • Refutation
        • R(b);CHECK,XP(I)
    • Try
      • S(B);CHECK
      • Vars
        • K(d);P-FLIGHT,XS(E)::QAB1(K)
      • Refutation
        • P(c);XS(B)
    • Try
      • Q(K);
      • Threat
        • S(B)
      • Vars
        • P(f);SBLOCK,XR(F)::QAR(K)+S(E)
      • Refutation
        • R(b);
    • Try
      • Q(K);
      • Threat
        • QAB(K)+R(F),XP(e)
      • Vars
        • P(f);OGATE,P_SPINP(f),XR(F)::QAB1(K),XP(f)
      • Refutation
        • P(f);
  • Actual
    • S(E);
    • Threat
      • R1(F)
    • Vars
      • K(d);OGATEB,P_SPINP(c),S_FLIGHT,XR(F)::QAB(K)
      • P(f);SBLOCK,XR(F)::S(B)
      • P(g);OGATE,XS(E)::QAR2(K),XP(f)
      • P(f);::R1(F),XP(f)
      • P(g);OGATE::QAR2(K),XP(f)
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