MESON Chess Problem Database

Problem Display
PID: 271389 (2r1q1r1/4n2b/5n2/5p2/1P1k4/3P1PN1/BP3PK1/N2RR1B1 w - - 0 1)

Leites, Samuil Davidovich

Die Schwalbe, 1932

2r1q1r1/4n2b/5n2/5p2/1P1k4/3P1PN1/BP3PK1/N2RR1B1

#2

12 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rc2
      • 2.Sxc2#
    • 1...Rc4
      • 2.dxc4#
    • 1...Ra8
      • 2.Sc2#
    • 1...Rb8
      • 2.Sc2#
    • 1...Rd8
      • 2.Sc2#
    • 1...Rxg3+
      • 2.fxg3#
    • 1...Sfd5
      • 2.Sb3#
    • 1...Sed5
      • 2.Sb3#
    • 1...Sc6
      • 2.Sc2#
    • 1...Sg6
      • 2.Sxf5#
  • Keys
    • 1.f4!
      • threat
        • 2.f3#
      • 1...Rxg3+
        • 2.fxg3#
      • 1...Rc4
        • 2.dxc4#
      • 1...Rc2
        • 2.Sxc2#
      • 1...Se4
        • 2.dxe4#
      • 1...Sg4
        • 2.Se2#
      • 1...Sfd5
        • 2.Sb3#
      • 1...Sed5
        • 2.Sb3#
      • 1...Sc6
        • 2.Sc2#
      • 1...Sg6
        • 2.Sxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(f);N_GUARD,P_PINP(G)::S(A),XR(f)
    • R(f);OGATE::R(B)+P(I),XR(f)
    • R(f);N_GUARD::S(A)
    • R(h);CHECK,OGATE,XS(K)::B(D)+P(G),XR(h)
    • S(c);SBLOCK::S(A)
    • S(d);SBLOCK::S(A)
    • S(d);S_CUTR(f)::S(A)
    • S(d);N_PINS(K)::S(K),XP(b)
  • Actual
    • P(J);
    • Threat
      • B(D)+P(G)
    • Vars
      • R(h);CHECK,OGATE,XS(K)::B(D)+P(G),XR(h)
      • R(f);OGATE::R(B)+P(I),XR(f)
      • R(f);N_GUARD,P_PINP(G)::S(A),XR(f)
      • S(c);OGATE::R(B)+P(I),XS(c)
      • S(c);N_PINS(K)::S(K)
      • S(c);SBLOCK::S(A)
      • S(d);SBLOCK::S(A)
      • S(d);S_CUTR(f)::S(A)
      • S(d);N_PINS(K)::S(K),XP(b)
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