MESON Chess Problem Database

Problem Display
PID: 87707 (7B/5bK1/2r1p1Q1/3P4/1R1ppr1p/P1k3qR/2Pp1N2/3B4 w - - 0 1)

Onyschuk, Eugene

American Chess Problemist, 1950

7B/5bK1/2r1p1Q1/3P4/1R1ppr1p/P1k3qR/2Pp1N2/3B4

#2

10 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rf3
      • 2.Sxe4#
    • 1...Rf5
      • 2.Sxe4#
    • 1...Rf6
      • 2.Sxe4#
    • 1...Rc4
      • 2.Rb3#
  • Keys
    • 1.Kh6!
      • threat
        • 2.Bxd4#
      • 1...Rf6
        • 2.Sxe4#
      • 1...Rc4
        • 2.Rb3#
      • 1...e3
        • 2.Qd3#
      • 1...e5
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(f);N_GUARD,N_SPINQ(c)::S(C),XP(e)
    • R(f);N_GUARD::S(C),XP(e)
    • R(h);SBLOCK::R1(F)
  • Actual
    • K(I);N_SPINQ(H),P_PINP(d),S_FLIGHT
    • Threat
      • B(J),XP(d)
    • Vars
      • R(f);N_GUARD,N_SPINP(d),P_PINQ(H)::S(C),XP(e)
      • R(h);SBLOCK::R1(F)
      • P(e);N_SPINQ(c),OGATE::QAR1(H)
      • P(i);N_SPINP(d),OGATE,P_PINQ(H)::QAR(H),XR(h)
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