MESON Chess Problem Database

Problem Display
PID: 75383 (3q4/2R1p1p1/1N2P3/1N2kBK1/r5p1/b1Pp4/1p2p3/7Q w - - 0 1)

Bakker, Peter Arie

Prize, Torquay, 2007

3q4/2R1p1p1/1N2P3/1N2kBK1/r5p1/b1Pp4/1p2p3/7Q

#2

8 + 10

56 The Problemist 2007
102 Probleemblad 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc7
      • 2.Qd5#
    • 1...Qd5
      • 2.Qxd5#
    • 1...Qd7
      • 2.Sxd7#
    • 1...Qa8
      • 2.Sd7#
    • 1...Qb8
      • 2.Sd7#
      • 2.Qd5#
    • 1...Qc8
      • 2.Qd5#
    • 1...Qe8
      • 2.Qd5#
    • 1...Qf8
      • 2.Sd7#
      • 2.Qd5#
    • 1...Qg8
      • 2.Sd7#
      • 2.Qd5#
    • 1...Qh8
      • 2.Sd7#
      • 2.Qd5#
    • 1...Rc4
      • 2.Sxc4#
    • 1...Re4
      • 2.Qxe4#
    • 1...Ra5
      • 2.Sc4#
      • 2.Qe4#
    • 1...Ra6
      • 2.Sc4#
      • 2.Qe4#
    • 1...Ra7
      • 2.Sc4#
      • 2.Qe4#
    • 1...Ra8
      • 2.Sc4#
      • 2.Qe4#
    • 1...Bb4
      • 2.Sc4#
      • 2.Qe4#
    • 1...Bd6
      • 2.Qd5#
  • Tries
    • 1.Rc5+?
      • 1...Qd5
        • 2.Sd7#
        • 2.Rxd5#
        • 2.Qxd5#
      • 1...Bxc5!
    • 1.Rd7?
      • threat
        • 2.Qd5#
      • 1...Qxd7
        • 2.Sxd7#
      • 1...Rd4
        • 2.cxd4#
      • 1...Re4
        • 2.Qxe4#
      • 1...Qa8!
    • 1.Qh2+?
      • 1...Rf4
        • 2.Qxf4#
      • 1...g3!
    • 1.c4?
      • threat
        • 2.Qe4#
      • 1...Rxc4
        • 2.Sxc4#
      • 1...e1Q
        • 2.Qxe1#
      • 1...e1R
        • 2.Qxe1#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Qa8
        • 2.Sd7#
      • 1...Qd4!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Qe4#
      • 1...Rxc4
        • 2.Sxc4#
      • 1...e1Q
        • 2.Qxe1#
      • 1...e1R
        • 2.Qxe1#
      • 1...Qd4
        • 2.cxd4#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Qa8
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • Q(j);N_GUARD,XR(H)::QAR1(A)
    • Q(j);N_GUARD::QAR1(A),XQ(j)
    • Q(j);N_GUARD::S(F),XQ(j)
    • Q(j);N_GUARD::S(F)
    • Q(j);N_GUARD::QAR1(A)
    • R(e);N_GUARD::S(F),XR(e)
    • R(e);N_GUARD::QAR1(A),XR(e)
    • B(c);S_CUTQ(j)::QAR1(A)
  • Tries
    • Try
      • R(H);CHECK
      • Refutation
        • B(c);XR(H)
    • Try
      • R(H);
      • Threat
        • QAR1(A)
      • Vars
        • Q(j);XR(H)::S(F),XQ(j)
        • R(e);OGATE::P(B),XR(e)
        • R(e);N_GUARD::QAR1(A),XR(e)
      • Refutation
        • Q(j);
    • Try
      • Q(A);CHECK
      • Vars
        • R(e);N_GUARD,P_SPINR(e)::QAB1(A),XR(e)
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • P(B);
      • Threat
        • QAR1(A)
      • Vars
        • R(e);XP(B)::S(F),XR(e)
        • P(b);OGATEB::QAR(A),XQ(b)
        • P(b);OGATEB::QAR(A),XR(b)
        • Q(j);N_GUARD::QAR1(A),XQ(j)
        • Q(j);N_GUARD::S(F)
      • Refutation
        • Q(j);
  • Actual
    • R(H);
    • Threat
      • QAR1(A)
    • Vars
      • R(e);XR(H)::S(F),XR(e)
      • P(b);OGATEB::QAR(A),XQ(b)
      • P(b);OGATEB::QAR(A),XR(b)
      • Q(j);OGATE::P(B),XQ(j)
      • Q(j);N_GUARD::QAR1(A),XQ(j)
      • Q(j);N_GUARD::S(F)
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