MESON Chess Problem Database

Problem Display
PID: 82097 (r3R3/1r4p1/4N3/2P1B1K1/2PPk1pR/2Q2p1P/3n1p2/5nq1 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Arbejder-Skak, 1962

r3R3/1r4p1/4N3/2P1B1K1/2PPk1pR/2Q2p1P/3n1p2/5nq1

#2

10 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qh1
      • 2.Rxg4#
    • 1...Sg3
      • 2.Rxg4#
  • Tries
    • 1.Bf4?
      • threat
        • 2.Qc2#
      • 1...gxh3+
        • 2.Bg3#
      • 1...Rb2
        • 2.Sd8#
      • 1...Rb3
        • 2.Sd8#
      • 1...Ra2
        • 2.Sc7#
      • 1...Ra3
        • 2.Sc7#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sxc4!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Qd3#
      • 1...gxh3+
        • 2.Sg2#
      • 1...Rb3
        • 2.Bb8#
      • 1...Ra3
        • 2.Bc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(b);N_GUARD::R(E),XP(g)
    • S(a);S_CUTQ(b)::R(E),XP(g)
  • Tries
    • Try
      • B(G);N_PINP(g)
      • Threat
        • QAB(A)
      • Vars
        • P(g);CHECK,OGATEB,XP(B)::R(E)+B(G)
        • R(h);N_GUARD::R(J)+S(I)
        • R(j);N_GUARD::R(J)+S(I)
        • S(a);N_GUARD::QAR1(A),XS(a)
      • Refutation
        • S(c);XP(C)
  • Actual
    • S(I);N_PINP(g)
    • Threat
      • QAB1(A)
    • Vars
      • P(g);CHECK,XP(B)::R(E)+S(I)
      • R(h);N_GUARD::R(J)+B(G)
      • R(j);N_GUARD::R(J)+B(G)
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