MESON Chess Problem Database

Problem Display
PID: 268865 (8/1p3p2/1p3K2/1P3p2/1Pk2B2/2p5/RpN1Np2/1R1B3Q w - - 0 1)

Nichtawitz, Alois

Troll, 2022

(First published on Wed Oct 12 2022)

8/1p3p2/1p3K2/1P3p2/1Pk2B2/2p5/RpN1Np2/1R1B3Q

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kb3
      • 2.Qd5#
    • 1...Kd3
      • 2.Qd5#
    • 1...Kxb5
      • 2.Qd5#
  • Tries
    • 1.Ke5?
      • threat
        • 2.Qd5#
      • 1...Kb3
        • 2.Qd5#
      • 1...Kd3
        • 2.Qd5#
      • 1...Kxb5
        • 2.Qd5#
      • 1...f6+!
    • 1.Sa3+?
      • 1...Kd3
        • 2.Qf3#
        • 2.Qd5#
      • 1...Kxb4!
    • 1.Qe4+?
      • 1...Kb3
        • 2.Sc1#
        • 2.Ra3#
        • 2.Qd5#
      • 1...Kxb5
        • 2.Sxc3#
        • 2.Qd5#
      • 1...fxe4!
    • 1.Qc6+?
      • 1...Kb3
        • 2.Sc1#
        • 2.Ra3#
        • 2.Qd5#
      • 1...Kd3
        • 2.Qd5#
      • 1...bxc6!
  • Keys
    • 1.Qf1!
      • 1...Kb3
        • 2.Sc1#
      • 1...Kd3
        • 2.Sg3#
      • 1...Kxb5
        • 2.Sed4#
      • 1...Kd5
        • 2.Sxc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(d);N_GUARD,P_SPINP(a),S_FLIGHT::QAB(C)
    • K(d);N_GUARD,S_FLIGHT::QAR2(C)
    • K(d);N_GUARD,S_FLIGHT,XP(I)::QAR2(C)
  • Tries
    • Try
      • K(J);S_FLIGHT
      • Threat
        • QAB1(C)
      • Vars
        • K(d);P_SPINP(a),S_FLIGHT::QAB(C)
        • K(d);S_FLIGHT::QAR2(C)
        • K(d);S_FLIGHT,XP(I)::QAR2(C)
      • Refutation
        • P(h);CHECK
    • Try
      • S(E);CHECK
      • Refutation
        • K(d);P-FLIGHT,P_SPINP(a),XP(G)
    • Try
      • Q(C);CHECK
      • Refutation
        • P(e);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(d);N_GUARD,S_FLIGHT::QAR2(C)
      • Refutation
        • P(g);XQ(C)
  • Actual
    • Q(C);
    • Vars
      • K(d);N_GUARD,P_SPINP(a),S_FLIGHT::S(F)
      • K(d);N_GUARD,S_FLIGHT::QAB(C)+S(F)
      • K(d);N_GUARD,S_FLIGHT,XP(I)::QAB(C)+S(F),DCHECK
      • K(d);N_GUARD,S_FLIGHT::S(F),XP(c)
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