MESON Chess Problem Database

Problem Display
PID: 101396 (8/3K4/8/2pk4/3p1pN1/3Q4/4P3/8 w - - 0 1)

Neukomm, Gyula (Julius) R

3rd HM., Good Companions (April), 1923

8/3K4/8/2pk4/3p1pN1/3Q4/4P3/8

#2

4 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...f3
      • 2.e4#
    • 1...c4
      • 2.Qf5#
  • Tries
    • 1.Se3+?
      • 1...Ke5
        • 2.Qf5#
      • 1...fxe3!
    • 1.Sh6?
      • 1...Ke5
        • 2.Qf5#
      • 1...c4
        • 2.Qf5#
      • 1...f3!
    • 1.Qc2?
      • 1...d3
        • 2.Qxd3#
      • 1...c4
        • 2.Qf5#
      • 1...f3!
    • 1.Qc4+?
      • 1...Ke4
        • 2.Qe6#
      • 1...Kxc4!
    • 1.Qg6?
      • threat
        • 2.Qe6#
      • 1...d3
        • 2.Qxd3#
      • 1...c4
        • 2.Qf5#
        • 2.Qc6#
      • 1...Kc4!
    • 1.Qb3+?
      • 1...Ke4
        • 2.Qe6#
      • 1...c4!
    • 1.e3?
      • threat
        • 2.e4#
      • 1...c4
        • 2.Qf5#
        • 2.Qxd4#
      • 1...fxe3!
  • Keys
    • 1.Qa6!
      • threat
        • 2.Qe6#
      • 1...Ke4
        • 2.Qe6#
      • 1...d3
        • 2.Qxd3#
      • 1...c4
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(b);N_GUARD::P(A)
    • P(c);SBLOCK::QAR2(B)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(d);N_SPINP(a),P-FLIGHT::QAR1(B)
      • Refutation
        • P(b);XS(C)
    • Try
      • S(C);
      • Vars
        • K(d);N_SPINP(a),P-FLIGHT::QAR1(B)
        • P(c);SBLOCK::QAR2(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);N_PINP(a)
      • Vars
        • P(a);OGATEB::QAR2(B),XP(a)
        • P(c);SBLOCK::QAR2(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);CHECK,N_PINP(a)
      • Vars
        • K(d);OGATE,P_SPINP(a),S_FLIGHT::QAR2(B)
      • Refutation
        • K(d);S_FLIGHT,XQ(B)
    • Try
      • Q(B);N_PINP(a)
      • Threat
        • QAB1(B)
      • Vars
        • P(a);OGATEB::QAR2(B),XP(a)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(B);CHECK,N_PINP(a)
      • Vars
        • K(d);OGATE,S_FLIGHT::QAR2(B)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • P(A);
      • Threat
        • P(A)
      • Refutation
        • P(b);XP(A)
  • Actual
    • Q(B);N_PINP(a)
    • Threat
      • QAB1(B)
    • Vars
      • K(d);S_FLIGHT::QAR2(B)
      • P(a);OGATEB::QAR2(B),XP(a)
      • P(c);::QAB1(B)
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