MESON Chess Problem Database

Problem Display
PID: 108867 (5N2/8/K3pB2/1Qpkrp2/2R5/5P2/b2Pn2b/2rR2q1 w - - 0 1)

Lender, Baruch

Canadian Chess Chat, 1984

5N2/8/K3pB2/1Qpkrp2/2R5/5P2/b2Pn2b/2rR2q1

#2

8 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qd7#
    • 1...Qxd1
      • 2.Qxc5#
    • 1...Qe1
      • 2.Qxc5#
    • 1...Qf1
      • 2.Qxc5#
    • 1...Qh1
      • 2.Qxc5#
    • 1...Qg2
      • 2.Qxc5#
    • 1...Qg3
      • 2.Qxc5#
    • 1...Qg4
      • 2.Qxc5#
    • 1...Qg5
      • 2.Qxc5#
    • 1...Qg6
      • 2.Qxc5#
    • 1...Qg7
      • 2.Qxc5#
    • 1...Qg8
      • 2.Qxc5#
    • 1...Rxc4
      • 2.Qd7#
    • 1...Re3
      • 2.Qxc5#
    • 1...Sd4
      • 2.Qxc5#
  • Tries
    • 1.Qb7+?
      • 1...Kd6
        • 2.Be7#
        • 2.Qd7#
      • 1...Kxc4!
    • 1.d4?
      • threat
        • 2.Qxc5#
      • 1...Kd6
        • 2.Qd7#
      • 1...Rxc4
        • 2.Qd7#
      • 1...Bxc4!
  • Keys
    • 1.d3!
      • threat
        • 2.Qd7#
      • 1...Kd6
        • 2.Qd7#
      • 1...Bxc4
        • 2.dxc4#
      • 1...Qg7
        • 2.Qxc5#
      • 1...Re3
        • 2.Qxc5#
      • 1...Re4
        • 2.dxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 12
  • Sets
    • K(g);N_SPINP(f),P-FLIGHT::QAR1(E)
    • Q(b);N_GUARD,XR(A)::QAR1(E),XP(f)
    • Q(b);N_GUARD::QAR1(E),XP(f)
    • R(a);SBLOCK,XR(D)::QAR2(E)
    • R(h);S_CUTQ(b)::QAR1(E),XP(f)
    • S(d);S_CUTQ(b)::QAR1(E),XP(f)
  • Tries
    • Try
      • Q(E);CHECK,N_PINP(f)
      • Refutation
        • K(g);S_FLIGHT,XR(D)
    • Try
      • P(B);
      • Threat
        • QAR1(E),XP(f)
      • Vars
        • K(g);N_SPINP(f),P-FLIGHT::QAR1(E)
        • R(a);SBLOCK,XR(D)::QAR2(E)
      • Refutation
        • B(c);P_PINQ(E),XR(D)
  • Actual
    • P(B);
    • Threat
      • QAR2(E)
    • Vars
      • K(g);N_SPINP(f),P-FLIGHT::QAR1(E)
      • B(c);OGATE,P_PINQ(E),XR(D)::R(A)+P(B)DCHECK,XB(c)
      • Q(b);N_GUARD::QAR1(E),XP(f)
      • R(h);S_CUTQ(b)::QAR1(E),XP(f)
      • R(h);OGATE::R(A)+P(B)DCHECK,XR(h)
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