MESON Chess Problem Database

Problem Display
PID: 287198 (6Q1/K2p4/1R1P1p2/2k4r/1p1pR2r/3p4/pPP5/q7 w - - 0 1)

Heyl, Peter

Problem-Forum, 2008

6Q1/K2p4/1R1P1p2/2k4r/1p1pR2r/3p4/pPP5/q7

#2

7 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Qc8#
    • 1...f5
      • 2.Re5#
  • Tries
    • 1.b3?
      • threat
        • 2.Qc4#
      • 1...Rd5
        • 2.Qc8#
      • 1...Qc3!
    • 1.cxd3?
      • threat
        • 2.Qc4#
      • 1...Rd5
        • 2.Qc8#
      • 1...Qc1!
    • 1.c3?
      • threat
        • 2.cxb4#
        • 2.cxd4#
      • 1...Rxe4
        • 2.cxb4#
      • 1...bxc3
        • 2.b4#
      • 1...dxc3
        • 2.Qc4#
      • 1...Rd5
        • 2.Qc8#
      • 1...Qe1
        • 2.cxd4#
      • 1...Qg1
        • 2.cxb4#
      • 1...b3
        • 2.cxd4#
      • 1...Qxb2!
  • Keys
    • 1.c4!
      • threat
        • 2.Qc8#
      • 1...bxc4 ep
        • 2.b4#
      • 1...dxc4 ep
        • 2.Qc4#
      • 1...Rh8
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(h);SBLOCK::QAR(G)
    • P(i);N_GUARD,S_CUTR(h)::R(C)
  • Tries
    • Try
      • P(A);
      • Threat
        • QAR1(G)
      • Vars
        • R(h);SBLOCK::QAR(G)
      • Refutation
        • Q(a);
    • Try
      • P(B);XP(c)
      • Threat
        • QAR1(G)
      • Vars
        • R(h);SBLOCK::QAR(G)
      • Refutation
        • Q(a);
    • Try
      • P(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(f);XR(C)::P(B),XP(d)
        • P(d);OGATE,XP(B)::P(A)
        • P(e);XP(B)::QAR1(G)
        • R(h);SBLOCK::QAR(G)
        • Q(a);::P(B),XP(e)
        • Q(a);::P(B),XP(d)
        • P(d);::P(B),XP(e)
      • Refutation
        • Q(a);XP(A)
  • Actual
    • P(B);
    • Threat
      • QAR(G)
    • Vars
      • P(d);EP,OGATE,XP(B)::P(A)
      • P(e);EP,OGATE,XP(B)::QAR1(G)
      • R(h);N_GUARD::QAR1(G)
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