MESON Chess Problem Database

Problem Display
PID: 135837 (n2R3n/3P4/B1kp2p1/2PN4/p2QP1K1/qp1N4/8/8 w - - 0 1)

Janevski, Zivko

Mat Plus, 2009

n2R3n/3P4/B1kp2p1/2PN4/p2QP1K1/qp1N4/8/8

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.S3b4#
      • 2.Qxa4#
    • 1...Qb2
      • 2.S3b4#
      • 2.Qxa4#
    • 1...Qb4
      • 2.S3xb4#
    • 1...Qa1
      • 2.S3b4#
    • 1...Qa2
      • 2.S3b4#
    • 1...Sc7
      • 2.Se7#
    • 1...dxc5
      • 2.Qf6#
  • Tries
    • 1.S5b4+?
      • 1...Qxb4
        • 2.Qxd6#
      • 1...Kc7!
    • 1.Bb5+?
      • 1...Kb7
        • 2.c6#
      • 1...Kxb5!
    • 1.Rc8+?
      • 1...Sc7
        • 2.Rxc7#
      • 1...Kxd7!
    • 1.Qf6?
      • threat
        • 2.Qxd6#
      • 1...Qxc5
        • 2.Se5#
      • 1...Sf7!
    • 1.Qc4?
      • threat
        • 2.Qb5#
      • 1...Qxc5
        • 2.S3b4#
      • 1...Qb4
        • 2.S3xb4#
      • 1...Sc7
        • 2.Se7#
      • 1...dxc5!
  • Keys
    • 1.cxd6!
      • threat
        • 2.Se7#
      • 1...Kxd6
        • 2.Qf6#
      • 1...Qxd6
        • 2.Qxa4#
      • 1...Qc5
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD::S(A),XQ(a)
    • Q(a);N_GUARD::S(A)
    • S(g);SBLOCK::S(F)
    • P(e);OGATEB,XP(E)::QAR(B)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • Q(a);XS(F)::QAR1(B),XP(e)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • B(G);CHECK
      • Vars
        • K(d);OGATE,S_FLIGHT::P(E)
      • Refutation
        • K(d);S_FLIGHT,XB(G)
    • Try
      • R(I);CHECK
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::R1(I),XS(g)
      • Refutation
        • K(d);S_FLIGHT,XP(H)
    • Try
      • Q(B);P_PINP(e)
      • Threat
        • QAR1(B),XP(e)
      • Vars
        • Q(a);SBLOCK,XP(E)::S(A)
      • Refutation
        • S(h);
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a),XP(E)::S(A)
        • Q(a);N_GUARD::S(A),XQ(a)
        • S(g);SBLOCK::S(F)
      • Refutation
        • P(e);P_SPINP(e),XP(E)
  • Actual
    • P(E);XP(e)
    • Threat
      • S(F)
    • Vars
      • K(d);OGATEB,P-FLIGHT,XP(E)::QAR2(B)
      • Q(a);N_GUARD,SBLOCK,XP(E)::QAB(B),XP(c)
      • Q(a);N_GUARD::QAR1(B),XQ(a)
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