MESON Chess Problem Database

Problem Display
PID: 74847 (3N1n1B/2r5/8/3nNkPp/5p2/4p3/b1R3Q1/1BK5 w - - 0 1)

Levman, Semyon Semyonovich

Tijdschrift vd KNSB, 1938

3N1n1B/2r5/8/3nNkPp/5p2/4p3/b1R3Q1/1BK5

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc2+
      • 2.Bxc2#
    • 1...Ra7
      • 2.Rxa2#
    • 1...Rd7
      • 2.Rxa2#
    • 1...Re7
      • 2.Rxa2#
    • 1...Rf7
      • 2.Rxa2#
    • 1...Rh7
      • 2.Rxa2#
    • 1...Bc4
      • 2.Rxc4#
  • Tries
    • 1.Qh3+?
      • 1...Ke4
        • 2.Rc4#
      • 1...Kxg5!
    • 1.Qe4+?
      • 1...Kxe4
        • 2.Rc4#
      • 1...Kxg5!
    • 1.Qg4+?
      • 1...Ke4
        • 2.Rc4#
      • 1...hxg4!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Sh4#
      • 1...Rxc2+
        • 2.Bxc2#
      • 1...Ke4
        • 2.Rc4#
      • 1...Kg6
        • 2.Rc6#
      • 1...Rg7
        • 2.Rxa2#
      • 1...Sf6
        • 2.Rc5#
      • 1...Sg6
        • 2.Sd4#
      • 1...h4
        • 2.Sxh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 6
  • Sets
    • R(g);CHECK,OGATE,P_SPINR(g),XR(C)::B(A),XR(g)
    • R(g);N_PINR(C)::B(A)+R(C),XB(a)
    • B(a);N_GUARD,N_PINR(C)::B(A)+R(C),XB(a)
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • K(e);S_FLIGHT::B(A)+R(C),DCHECK
      • Refutation
        • K(e);P-FLIGHT,XP(F)
    • Try
      • Q(D);CHECK
      • Vars
        • K(e);S_FLIGHT,XQ(D)::B(A)+R(C),DCHECK
      • Refutation
        • K(e);P-FLIGHT,XP(F)
    • Try
      • Q(D);CHECK
      • Vars
        • K(e);P_SPINP(c),S_FLIGHT::B(A)+R(C),DCHECK
      • Refutation
        • P(f);XQ(D)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • R(g);CHECK,OGATE,P_SPINR(g),XR(C)::B(A),XR(g)
      • K(e);S_FLIGHT::B(A)+R(C),DCHECK
      • R(g);N_PINR(C)::B(A)+R(C),XB(a)
      • S(d);::B(A)+R(C),DCHECK
      • S(h);SBLOCK::S(E)
      • P(f);::S(E),XP(f)
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