MESON Chess Problem Database

Problem Display
PID: 202554 (8/8/1np3Kb/1n1p1p2/1RN3p1/1N1k3B/1pR2PQ1/8 w - - 0 1)

Onitiu, Valerian

Magyar Sakkvilag, 1923

8/8/1np3Kb/1n1p1p2/1RN3p1/1N1k3B/1pR2PQ1/8

#2

8 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...g3
      • 2.Bxf5#
  • Tries
    • 1.Qf3+?
      • 1...Be3
        • 2.Qxf5#
      • 1...gxf3
        • 2.Bxf5#
      • 1...Kxc2!
    • 1.f3?
      • threat
        • 2.Qe2#
      • 1...gxf3
        • 2.Bxf5#
      • 1...Bd2
        • 2.Qxd2#
      • 1...Sd4
        • 2.Sc5#
      • 1...Sc3!
  • Keys
    • 1.f4!
      • threat
        • 2.Qe2#
      • 1...gxf4 ep
        • 2.Bxf5#
      • 1...Sc3
        • 2.Rd2#
      • 1...Sd4
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(c);OGATE::B(E),XP(f)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • B(i);P_SPINB(i)::QAB(C),XP(f)
        • P(c);OGATE,XQ(C)::B(E),XP(f)
      • Refutation
        • K(b);S_FLIGHT,XR(A)
    • Try
      • P(B);
      • Threat
        • QAB1(C)
      • Vars
        • P(c);OGATE,XP(B)::B(E),XP(f)
        • B(i);N_GUARD::QAR1(C),XB(i)
        • S(d);SBLOCK::S(D)
      • Refutation
        • S(d);
  • Actual
    • P(B);
    • Threat
      • QAB1(C)
    • Vars
      • P(c);EP,OGATE,XP(B)::B(E),XP(f)
      • S(d);SBLOCK::R1(A)
      • S(d);SBLOCK::S(D)
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