MESON Chess Problem Database

Problem Display
PID: 216824 (2n5/1N4B1/5R2/3k1p2/2r5/2b1RN2/6P1/5QK1 w - - 0 1)

Zhuk, Aleksandr Gnatovich

Zadachi i Etyudi, 1999

2n5/1N4B1/5R2/3k1p2/2r5/2b1RN2/6P1/5QK1

#2

8 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Ra4
      • 2.Qb5#
    • 1...Rd4
      • 2.Re5#
      • 2.Qb5#
    • 1...Re4
      • 2.Qb5#
    • 1...Rf4
      • 2.Qb5#
    • 1...Rg4
      • 2.Qb5#
    • 1...Rh4
      • 2.Qb5#
    • 1...Be1
      • 2.Re5#
    • 1...Bd2
      • 2.Re5#
    • 1...Bb4
      • 2.Re5#
    • 1...Ba5
      • 2.Re5#
    • 1...Be5
      • 2.Rxe5#
    • 1...Sb6
      • 2.Rd6#
    • 1...Sd6
      • 2.Rxd6#
    • 1...Sa7
      • 2.Rd6#
    • 1...Se7
      • 2.Rd6#
  • Tries
    • 1.Qd3+?
      • 1...Rd4
        • 2.Re5#
        • 2.Qb5#
      • 1...Bd4!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Rxf5#
      • 1...Kxd4
        • 2.Qd3#
      • 1...Rxd4
        • 2.Qb5#
      • 1...Bxd4
        • 2.Qf3#
      • 1...Sd6
        • 2.Rxd6#
      • 1...Se7
        • 2.Rd6#
      • 1...f4
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 12
  • Sets
    • R(b);OGATE::QAR2(A)
    • R(b);OGATE,P_PINP(C)::QAR2(A)
    • B(a);N_GUARD::R1(D)
    • B(a);N_GUARD::R1(D),XB(a)
    • S(e);N_GUARD::R1(F)
    • S(e);N_GUARD::R1(F),XS(e)
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • B(a);P_PINR(D),P_SPINB(a)
  • Actual
    • S(E);
    • Threat
      • R(F),XP(d)
    • Vars
      • K(c);OGATEB,P-FLIGHT,XS(E)::QAR1(A)
      • R(b);OGATE,SBLOCK,XS(E)::QAR2(A)
      • B(a);P_PINR(D),SBLOCK,XS(E)::QAB(A)
      • S(e);N_GUARD::R1(F),XS(e)
      • S(e);N_GUARD::R1(F)
      • P(d);::R(F)
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