MESON Chess Problem Database

Problem Display
PID: 227863 (8/8/8/2K5/8/3k4/2nB2Q1/2R5 w - - 0 1)

Schonberger, Tibor

Magyar Sakkvilag, 1926

8/8/8/2K5/8/3k4/2nB2Q1/2R5

#2

4 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Rc3#
    • 1...Se1
      • 2.Rc3#
    • 1...Sa3
      • 2.Rc3#
    • 1...Se3
      • 2.Rc3#
    • 1...Sb4
      • 2.Rc3#
    • 1...Sd4
      • 2.Rc3#
  • Tries
    • 1.Qf2?
      • 1...Se1
        • 2.Qe3#
      • 1...Sa1
        • 2.Qe3#
      • 1...Sa3
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sb4
        • 2.Qe3#
      • 1...Sd4
        • 2.Qe3#
      • 1...Ke4!
    • 1.Qg5?
      • 1...Ke4
        • 2.Qd5#
      • 1...Se3
        • 2.Qxe3#
      • 1...Se1
        • 2.Qe3#
      • 1...Sa1
        • 2.Qe3#
      • 1...Sa3
        • 2.Qe3#
      • 1...Sb4
        • 2.Qe3#
      • 1...Sd4
        • 2.Qe3#
      • 1...Ke2!
  • Keys
    • 1.Qf3+!
      • 1...Kxd2
        • 2.Rd1#
      • 1...Se3
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • S(a);OGATE::R1(A)
  • Tries
    • Try
      • Q(C);
      • Vars
        • S(a);N_GUARD::QAR1(C)
        • S(a);N_GUARD::QAR1(C),XS(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(b);S_FLIGHT::QAB1(C)
        • S(a);N_GUARD::QAR1(C),XS(a)
        • S(a);N_GUARD::QAR1(C)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(C);CHECK
    • Vars
      • K(b);P-FLIGHT,XB(B)::R1(A)
      • S(a);N_GUARD,P_SPINS(a)::QAR1(C),XS(a)
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