MESON Chess Problem Database

Problem Display
PID: 241743 (8/8/8/8/2p3R1/2K1p3/4k3/6Q1 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1928

8/8/8/8/2p3R1/2K1p3/4k3/6Q1

#2

3 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.Qg2#
  • Tries
    • 1.Kc2?
      • 1...Kf3
        • 2.Qg2#
      • 1...c3!
    • 1.Kxc4?
      • 1...Kf3
        • 2.Qg2#
      • 1...Kd2!
    • 1.Qxe3+?
      • 1...Kd1
        • 2.Rg1#
        • 2.Rd4#
        • 2.Qd2#
      • 1...Kf1
        • 2.Rg1#
      • 1...Kxe3!
    • 1.Qg2+?
      • 1...Kd1
        • 2.Qf1#
      • 1...Ke1!
  • Keys
    • 1.Qh2+!
      • 1...Kd1
        • 2.Rg1#
      • 1...Ke1
        • 2.Rg1#
      • 1...Kf1
        • 2.Rg1#
      • 1...Kf3
        • 2.Rf4#
        • 2.Qg2#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(a);S_FLIGHT::QAB1(A)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • P(c);
    • Try
      • K(B);P-FLIGHT,XP(c)
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK,XP(b)
      • Vars
        • K(a);S_FLIGHT::R1(C)
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(A);CHECK
    • Vars
      • K(a);S_FLIGHT::R(C)
      • K(a);P-FLIGHT::R(C)
      • K(a);S_FLIGHT::R1(C)
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