MESON Chess Problem Database

Problem Display
PID: 186262 (3N4/8/3p4/1p1N2P1/3k4/1K2pQ2/8/8 w - - 0 1)

Kupper, Josef

idee & form, 2016

3N4/8/3p4/1p1N2P1/3k4/1K2pQ2/8/8

#2

5 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Qxe3#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Qd5#
      • 1...Kd3
        • 2.Qd1#
        • 2.Qd5#
      • 1...Kc5
        • 2.Qxe3#
      • 1...Ke5
        • 2.Qe4#
        • 2.Qf6#
      • 1...d5
        • 2.Qxd5#
      • 1...e2!
    • 1.Sb4?
      • threat
        • 2.Qd5#
      • 1...Kc5
        • 2.Qxe3#
      • 1...Ke5
        • 2.Sbc6#
      • 1...d5
        • 2.Qxd5#
      • 1...e2!
    • 1.Sc6+?
      • 1...Kd3
        • 2.Qxe3#
      • 1...Kc5!
    • 1.Se6+?
      • 1...Kd3
        • 2.Qxe3#
      • 1...Ke5!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Qd5#
      • 1...Kd3
        • 2.Qd1#
      • 1...Kc5
        • 2.Qxe3#
      • 1...Ke5
        • 2.Qe4#
      • 1...e2
        • 2.Qc3#
      • 1...d5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT,P_SPINP(a)::QAR1(B),XP(a)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR1(B)
      • Vars
        • K(b);S_FLIGHT::QAB(B),XP(a)
        • P(d);::QAR1(B),XP(d)
      • Refutation
        • P(a);
    • Try
      • S(C);
      • Threat
        • QAR1(B)
      • Vars
        • K(b);S_FLIGHT::QAB(B),XP(a)
        • K(b);S_FLIGHT::S(C)
        • P(d);::QAR1(B),XP(d)
      • Refutation
        • P(a);
    • Try
      • S(E);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a)::QAR1(B),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a)::QAR1(B),XP(a)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(C);
    • Threat
      • QAR1(B)
    • Vars
      • K(b);P-FLIGHT,P_SPINP(a)::QAR2(B)
      • K(b);S_FLIGHT::QAB(B),XP(a)
      • K(b);S_FLIGHT::QAR1(B)
      • P(a);OGATE::QAB1(B)
      • P(d);::QAR1(B),XP(d)
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