MESON Chess Problem Database

Problem Display
PID: 82247 (2R5/2nN4/p2b4/8/3kPp1R/3p2P1/BP3pQ1/1NB2K2 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Rochade Europa, 1983

2R5/2nN4/p2b4/8/3kPp1R/3p2P1/BP3pQ1/1NB2K2

#2

11 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb5
      • 2.Rc4#
    • 1...Sd5
      • 2.Rc4#
    • 1...Se6
      • 2.Rc4#
    • 1...Sa8
      • 2.Rc4#
    • 1...Se8
      • 2.Rc4#
    • 1...fxg3
      • 2.e5#
    • 1...f3
      • 2.Qxf2#
      • 2.e5#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Qxf2#
      • 1...fxg3
        • 2.e5#
      • 1...Sd5
        • 2.Rc4#
      • 1...d2!
    • 1.Be3+?
      • 1...fxe3
        • 2.e5#
      • 1...Kxe3!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Qxf2#
      • 1...Ke3
        • 2.Qxf2#
      • 1...fxg3
        • 2.Sf3#
      • 1...Sd5
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • S(g);OGATE::R1(K)
    • P(d);XP(G)::R(I)+P(H)
  • Tries
    • Try
      • S(A);
      • Threat
        • QAB(F),XP(a)
      • Vars
        • P(d);XP(G)::R(I)+P(H)
        • S(g);OGATE::R1(K)
      • Refutation
        • P(b);
    • Try
      • B(B);CHECK
      • Vars
        • P(d);SBLOCK,XB(B)::R(I)+P(H)
      • Refutation
        • K(c);S_FLIGHT,XB(B)
  • Actual
    • S(A);
    • Threat
      • QAB(F),XP(a)
    • Vars
      • K(c);S_FLIGHT::QAB1(F),XP(a)
      • P(d);XP(G)::S(A)
      • S(g);::S(A)
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