MESON Chess Problem Database

Problem Display
PID: 143544 (8/q1p5/2N5/P1p5/PPkpP3/1Np2p1R/4rp2/1QK2B2 w - - 0 1)

Handloser, Ralf Chris

1st Prize, Schweizerische Schachzeitung, 2004-2005

8/q1p5/2N5/P1p5/PPkpP3/1Np2p1R/4rp2/1QK2B2

#2

10 + 9

23 Die Schwalbe 2011
15527 schachkunst (1997-2010) (Hoffmann) 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa5
      • 2.Sbxa5#
    • 1...c2
      • 2.Qxc2#
    • 1...cxb4
      • 2.Se5#
  • Tries
    • 1.Sa1?
      • threat
        • 2.Se5#
      • 1...c2
        • 2.Qxc2#
        • 2.Qb3#
      • 1...d3
        • 2.Qb3#
      • 1...cxb4!
    • 1.Sxc5?
      • threat
        • 2.Se5#
        • 2.Qa2#
        • 2.Qd3#
        • 2.Qb3#
      • 1...c2
        • 2.Qxc2#
        • 2.Qb3#
      • 1...d3
        • 2.Qxd3#
        • 2.Qb3#
      • 1...Qxc5!
    • 1.Bxe2+?
      • 1...d3
        • 2.Bxd3#
      • 1...fxe2!
    • 1.Qc2?
      • threat
        • 2.Sd2#
      • 1...cxb4
        • 2.Se5#
      • 1...d3!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Sxc5#
      • 1...Kd3
        • 2.Qxe2#
      • 1...cxb4
        • 2.Se5#
      • 1...c2
        • 2.Qxc2#
      • 1...d3
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(h);XP(I)::S(D),XQ(h)
    • P(c);OGATEB::QAR2(A),XP(c)
    • P(g);SBLOCK,XP(G)::S(J)
  • Tries
    • Try
      • S(D);
      • Threat
        • S(J)
      • Vars
        • P(f);N_SPINR(a),SBLOCK::QAB1(A)
      • Refutation
        • P(g);XP(G)
    • Try
      • S(D);XP(g)
      • Threat
        • DUALS(4)
      • Refutation
        • Q(h);XS(D)
    • Try
      • B(C);CHECK,XR(a)
      • Vars
        • P(f);P_SPINP(f)::B(C),XP(f)
      • Refutation
        • P(d);XB(C)
    • Try
      • Q(A);P_PINP(c)
      • Threat
        • S(D)
      • Vars
        • P(g);SBLOCK,XP(G)::S(J)
      • Refutation
        • P(f);N_SPINR(a)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+S(D),XP(g)
    • Vars
      • K(e);P_SPINP(d),S_FLIGHT::QAB1(A),XR(a)
      • P(g);SBLOCK,XP(G)::S(J)
      • P(c);OGATEB::QAR2(A),XP(c)
      • P(f);N_SPINR(a),SBLOCK::QAB(A)+S(D),DCHECK
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