MESON Chess Problem Database

Problem Display
PID: 241825 (8/p7/P7/2p5/2Q5/k1K5/8/n7 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1930

8/p7/P7/2p5/2Q5/k1K5/8/n7

#2

3 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Qb3#
    • 1...Sb3
      • 2.Qxb3#
  • Tries
    • 1.Qd5?
      • 1...Sb3
        • 2.Qxb3#
      • 1...c4
        • 2.Qa5#
      • 1...Sc2
        • 2.Qb3#
      • 1...Ka4!
    • 1.Qb4+?
      • 1...Ka2
        • 2.Qb2#
      • 1...cxb4+!
    • 1.Qxc5+?
      • 1...Ka4
        • 2.Qb4#
      • 1...Ka2!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qa5#
      • 1...Ka2
        • 2.Qb2#
      • 1...Sb3
        • 2.Qxb3#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::QAR1(B)
    • S(a);N_GUARD::QAR1(B),XS(a)
  • Tries
    • Try
      • Q(B);
      • Vars
        • S(a);N_GUARD::QAR1(B),XS(a)
        • P(c);OGATE::QAR2(B)
        • S(a);N_GUARD::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • P(c);CHECK,XQ(B)
    • Try
      • Q(B);CHECK,XP(c)
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAR2(B)
    • Vars
      • K(b);P-FLIGHT::QAR1(B)
      • S(a);N_GUARD::QAR1(B),XS(a)
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