MESON Chess Problem Database

Problem Display
PID: 139380 (b1Q2q2/1r1N4/2B2p2/1P2br2/1Nk1Kp2/pR6/P7/3Rn3 w - - 0 1)

Ahues, Herbert Siegfried Oskar

7th HM., Rochade Europa, 2008-2009

b1Q2q2/1r1N4/2B2p2/1P2br2/1Nk1Kp2/pR6/P7/3Rn3

#2

9 + 10

1106 Rochade Europa 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb4
      • 2.Qg8#
    • 1...Qh6
      • 2.Qg8#
    • 1...Qg8
      • 2.Qxg8#
    • 1...Rxb5
      • 2.Bd5#
    • 1...Bd4
      • 2.Rxd4#
    • 1...Bd6
      • 2.Rd4#
    • 1...Bc7
      • 2.Rd4#
    • 1...Bb8
      • 2.Rd4#
  • Tries
    • 1.Sc2?
      • threat
        • 2.Bd5#
      • 1...Qb4
        • 2.Qg8#
      • 1...Bc7
        • 2.Rd4#
      • 1...Rc7!
    • 1.Sd3?
      • threat
        • 2.Bd5#
      • 1...Qb4
        • 2.Qg8#
      • 1...Rc7
        • 2.Sb6#
      • 1...Bc7!
    • 1.Rc1+?
      • 1...Bc3
        • 2.Rcxc3#
      • 1...Sc2!
  • Keys
    • 1.Sa6!
      • threat
        • 2.Bd5#
      • 1...Qb4
        • 2.Qg8#
      • 1...Rc7
        • 2.Sb6#
      • 1...Bc7
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • Q(j);OGATE,XS(D)::QAB(I)
    • Q(j);OGATE::QAB(I)
    • Q(j);OGATE::QAB(I),XQ(j)
    • R(h);P_PINB(G),SBLOCK,XP(F)::QAR(I)+B(G),DCHECK
    • B(e);N_GUARD::R1(A),XB(e)
    • B(e);N_GUARD::R1(A)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAR(I)+B(G),DCHECK
      • Vars
        • Q(j);OGATE::QAB(I)
        • B(e);N_GUARD::R1(A)
      • Refutation
        • R(h);P_PINB(G)
    • Try
      • S(D);
      • Threat
        • QAR(I)+B(G),DCHECK
      • Vars
        • Q(j);OGATE::QAB(I)
        • R(h);N_GUARD,P_PINB(G)::S(H)
      • Refutation
        • B(e);
    • Try
      • R(A);CHECK
      • Vars
        • B(e);N_GUARD,P_SPINB(e)::R1(A),XB(e)
      • Refutation
        • S(a);P_SPINS(a)
  • Actual
    • S(D);
    • Threat
      • QAR(I)+B(G),DCHECK
    • Vars
      • Q(j);OGATE::QAB(I)
      • R(h);N_GUARD,P_PINB(G)::S(H)
      • B(e);N_GUARD::R1(A)
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