MESON Chess Problem Database

Problem Display
PID: 241953 (2R5/p7/K1pk4/5P2/4Q3/8/8/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1933

2R5/p7/K1pk4/5P2/4Q3/8/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Rxc6#
    • 1...Kd7
      • 2.Qe6#
    • 1...c5
      • 2.Qe6#
  • Tries
    • 1.Ka5?
      • 1...Kc5
        • 2.Rxc6#
      • 1...Kd7
        • 2.Qe6#
      • 1...c5
        • 2.Qe6#
      • 1...a6!
    • 1.Kxa7?
      • 1...Kd7
        • 2.Qe6#
      • 1...c5
        • 2.Qe6#
      • 1...Kc5!
    • 1.Qxc6+?
      • 1...Ke7
        • 2.Qe6#
      • 1...Ke5!
    • 1.Qe3?
      • 1...Kd7
        • 2.Qe6#
      • 1...c5
        • 2.Qe6#
      • 1...Kd5!
    • 1.Qc4?
      • 1...Kd7
        • 2.Qe6#
      • 1...Ke7
        • 2.Qe6#
      • 1...c5
        • 2.Qe6#
      • 1...Ke5!
    • 1.Qe5+?
      • 1...Kd7
        • 2.Qc7#
        • 2.Qe6#
      • 1...Kxe5!
    • 1.f6?
      • 1...Kc5
        • 2.Rxc6#
      • 1...Kd7
        • 2.Qxc6#
      • 1...c5!
  • Keys
    • 1.Rd8+!
      • 1...Kc5
        • 2.Qd4#
      • 1...Kc7
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(b);P_SPINP(a),S_FLIGHT::R1(D),XP(a)
    • K(b);P-FLIGHT::QAB1(A)
    • P(a);::QAR1(A)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::R1(D),XP(a)
        • K(b);P-FLIGHT::QAB1(A)
        • P(a);::QAR1(A)
      • Refutation
        • P(c);
    • Try
      • K(C);P-FLIGHT,XP(c)
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
        • P(a);::QAR1(A)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • Q(A);CHECK,XP(a)
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
        • P(a);::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
        • K(b);S_FLIGHT::QAR1(A)
        • P(a);::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
    • Try
      • P(B);
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::R1(D),XP(a)
        • K(b);P-FLIGHT::QAB1(A),XP(a)
      • Refutation
        • P(a);
  • Actual
    • R(D);CHECK
    • Vars
      • K(b);S_FLIGHT::QAB1(A)
      • K(b);S_FLIGHT::QAR2(A)
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