MESON Chess Problem Database

Problem Display
PID: 227774 (8/8/4Q3/5p2/2R5/3k4/4p3/4Kb2 w - - 0 1)

Schonberger, Tibor

Magyar Sakkvilag, 1926

8/8/4Q3/5p2/2R5/3k4/4p3/4Kb2

#2

3 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bg2
      • 2.Qxe2#
    • 1...Bh3
      • 2.Qxe2#
    • 1...f4
      • 2.Qe4#
  • Tries
    • 1.Qxf5+?
      • 1...Ke3
        • 2.Qe4#
      • 1...Kxc4!
    • 1.Qd6+?
      • 1...Ke3
        • 2.Qa3#
        • 2.Qg3#
      • 1...Kxc4!
    • 1.Qf6?
      • threat
        • 2.Qc3#
        • 2.Qd4#
      • 1...Ke3
        • 2.Qc3#
      • 1...Kxc4!
    • 1.Qe7?
      • 1...Bg2
        • 2.Qxe2#
      • 1...Bh3
        • 2.Qxe2#
      • 1...f4
        • 2.Qe4#
      • 1...Kxc4!
    • 1.Qe8?
      • 1...Bg2
        • 2.Qxe2#
      • 1...Bh3
        • 2.Qxe2#
      • 1...f4
        • 2.Qe4#
      • 1...Kxc4!
  • Keys
    • 1.Rb4!
      • threat
        • 2.Qb3#
      • 1...Kc2
        • 2.Qc4#
      • 1...Kc3
        • 2.Qb3#
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • B(a);N_GUARD::QAB1(C),XP(b)
    • P(d);N_GUARD::QAB1(C)
  • Tries
    • Try
      • Q(C);CHECK,XP(d)
      • Vars
        • K(c);P-FLIGHT::QAR1(C)
      • Refutation
        • K(c);S_FLIGHT,XR(B)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(c);S_FLIGHT,XR(B)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT::QAR2(C)
      • Refutation
        • K(c);S_FLIGHT,XR(B)
    • Try
      • Q(C);
      • Vars
        • B(a);N_GUARD::QAB1(C),XP(b)
        • P(d);N_GUARD::QAB1(C)
      • Refutation
        • K(c);S_FLIGHT,XR(B)
    • Try
      • Q(C);
      • Vars
        • B(a);N_GUARD::QAB1(C),XP(b)
        • P(d);N_GUARD::QAB1(C)
      • Refutation
        • K(c);S_FLIGHT,XR(B)
  • Actual
    • R(B);
    • Threat
      • QAR2(C)
    • Vars
      • K(c);S_FLIGHT::QAR2(C)
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