MESON Chess Problem Database

Problem Display
PID: 241978 (5N2/8/8/2p5/2Qpk1N1/6K1/8/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1933

5N2/8/8/2p5/2Qpk1N1/6K1/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qd5#
  • Tries
    • 1.Sf2+?
      • 1...Ke3
        • 2.Qd3#
      • 1...Ke5
        • 2.Qe6#
      • 1...Kf5!
    • 1.Se3?
      • 1...Ke5
        • 2.Qe6#
      • 1...Kxe3!
    • 1.Se5?
      • 1...Ke3
        • 2.Qd3#
      • 1...Kxe5
        • 2.Qe6#
      • 1...Kf5!
    • 1.Sh6?
      • 1...Ke5
        • 2.Qe6#
      • 1...Ke3!
    • 1.Qb3?
      • threat
        • 2.Qf3#
      • 1...Kf5
        • 2.Qd5#
      • 1...d3!
    • 1.Qxc5?
      • 1...d3
        • 2.Sf2#
        • 2.Sf6#
        • 2.Qe5#
      • 1...Kd3!
  • Keys
    • 1.Qe2+!
      • 1...Kd5
        • 2.Qe6#
      • 1...Kf5
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINP(a),S_FLIGHT::QAR2(B)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(b);N_SPINP(a),P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • S(C);
      • Vars
        • K(b);N_SPINP(a),P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT,XS(C)
    • Try
      • S(C);
      • Vars
        • K(b);N_SPINP(a),P-FLIGHT::QAR1(B)
        • K(b);N_SPINP(a),OGATEB,P-FLIGHT,XS(C)::QAR1(B)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • S(C);
      • Vars
        • K(b);N_SPINP(a),P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT
    • Try
      • Q(B);N_PINP(a)
      • Threat
        • QAB1(B)
      • Vars
        • K(b);S_FLIGHT::QAR2(B)
      • Refutation
        • P(a);
    • Try
      • Q(B);N_PINP(a),XP(c)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(B);CHECK,N_PINP(a)
    • Vars
      • K(b);OGATE,S_FLIGHT::QAB1(B)
      • K(b);OGATE,S_FLIGHT::QAR1(B)
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