MESON Chess Problem Database

Problem Display
PID: 241858 (8/1K6/1p6/1k2p3/1p2R3/8/8/Q7 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1931

8/1K6/1p6/1k2p3/1p2R3/8/8/Q7

#2

3 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qxe5#
    • 1...b3
      • 2.Qxe5#
  • Tries
    • 1.Kc7?
      • 1...Kc5
        • 2.Qxe5#
      • 1...b3!
    • 1.Rg4?
      • 1...Kc5
        • 2.Qxe5#
      • 1...b3
        • 2.Qxe5#
      • 1...e4!
    • 1.Rh4?
      • 1...Kc5
        • 2.Qxe5#
      • 1...b3
        • 2.Qxe5#
      • 1...e4!
    • 1.Qc3?
      • threat
        • 2.Qxb4#
      • 1...Ka4
        • 2.Qxb4#
      • 1...Ka5
        • 2.Qxb4#
      • 1...b3
        • 2.Qb4#
        • 2.Qxe5#
      • 1...bxc3!
    • 1.Qd4?
      • threat
        • 2.Qxb4#
      • 1...Ka4
        • 2.Qxb4#
      • 1...Ka5
        • 2.Qxb4#
      • 1...b3
        • 2.Rxe5#
        • 2.Qxe5#
        • 2.Qxb6#
        • 2.Qb4#
        • 2.Qd5#
      • 1...exd4!
    • 1.Qe1?
      • threat
        • 2.Qxb4#
      • 1...Ka4
        • 2.Qxb4#
      • 1...Ka5
        • 2.Qxb4#
      • 1...b3
        • 2.Qb4#
      • 1...Kc5!
    • 1.Qa4+?
      • 1...Kc5
        • 2.Qc6#
      • 1...Kxa4!
    • 1.Qa7?
      • 1...b3
        • 2.Qxb6#
      • 1...Kc5!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Qxb4#
      • 1...Ka4
        • 2.Qxb4#
      • 1...Ka5
        • 2.Qxb4#
      • 1...Kc5
        • 2.Qxe5#
      • 1...b3
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR2(A),XP(c)
    • P(a);::QAR(A),XP(c)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAR2(A),XP(c)
      • Refutation
        • P(a);
    • Try
      • R(B);
      • Vars
        • K(b);P-FLIGHT::QAR2(A),XP(c)
        • P(a);::QAR(A),XP(c)
      • Refutation
        • P(c);
    • Try
      • R(B);
      • Vars
        • K(b);P-FLIGHT::QAR2(A),XP(c)
        • P(a);::QAR(A),XP(c)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::QAR1(A),XP(a)
        • K(b);P-FLIGHT,P_SPINP(a)::QAB1(A),XP(a)
      • Refutation
        • P(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::QAR1(A),XP(a)
        • K(b);P-FLIGHT::QAB1(A),XP(a)
      • Refutation
        • P(c);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::QAR1(A),XP(a)
        • K(b);P-FLIGHT,P_SPINP(a)::QAB1(A),XP(a)
        • P(a);::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT,XQ(A)
    • Try
      • Q(A);
      • Vars
        • P(a);::QAR1(A),XP(d)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(d)
  • Actual
    • Q(A);P_PINP(a)
    • Threat
      • QAR1(A),XP(a)
    • Vars
      • K(b);S_FLIGHT::QAR1(A),XP(a)
      • K(b);N_SPINP(a),P-FLIGHT::QAB1(A),XP(a)
      • K(b);N_SPINP(a),P-FLIGHT::QAR2(A),XP(c)
      • P(a);::QAR(A),XP(c)
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