MESON Chess Problem Database

Problem Display
PID: 102283 (8/8/8/5b2/6Np/4QPk1/8/7K w - - 0 1)

Hermanson, Halvar

Swenska Dagblad, 1930

8/8/8/5b2/6Np/4QPk1/8/7K

#2

4 + 3

6490 yacpdb 2009
5454 Near Snap 2014

SOLUTION

  • SOUND
  • Tries
    • 1.Sf2?
      • threat
        • 2.f4#
      • 1...Be4
        • 2.fxe4#
      • 1...Bg4
        • 2.fxg4#
      • 1...h3!
    • 1.Sh2?
      • threat
        • 2.f4#
      • 1...Kh3
        • 2.f4#
      • 1...Be4
        • 2.fxe4#
      • 1...Bg4
        • 2.fxg4#
      • 1...h3!
    • 1.Se5?
      • threat
        • 2.f4#
      • 1...Kh3
        • 2.f4#
      • 1...Be4
        • 2.fxe4#
      • 1...Bg4
        • 2.fxg4#
      • 1...h3!
    • 1.Sf6?
      • threat
        • 2.f4#
      • 1...Kh3
        • 2.f4#
      • 1...Be4
        • 2.fxe4#
      • 1...Bg4
        • 2.fxg4#
      • 1...h3!
    • 1.Qf2+?
      • 1...Kh3
        • 2.Qg2#
        • 2.Qh2#
      • 1...Kf4!
    • 1.Qf4+?
      • 1...Kh3
        • 2.Sf2#
        • 2.Qh2#
      • 1...Kxf4!
    • 1.Qe5+?
      • 1...Kh3
        • 2.Sf2#
        • 2.Qh2#
      • 1...Kxf3!
  • Keys
    • 1.Sh6!
      • threat
        • 2.f4#
      • 1...Kh3
        • 2.f4#
      • 1...h3
        • 2.Sxf5#
      • 1...Be4
        • 2.fxe4#
      • 1...Bg4
        • 2.fxg4#

Anticipated by 138673(1901)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);
      • Threat
        • QAR(B)+P(C)
      • Vars
        • B(c);OGATE,P_PINP(C)::QAR(B)+P(C),XB(c)
        • B(c);OGATE::QAR(B)+P(C),XB(c)
      • Refutation
        • P(b);
    • Try
      • S(D);
      • Threat
        • QAR(B)+P(C)
      • Vars
        • K(a);P-FLIGHT::QAR(B)+P(C)
        • B(c);OGATE,P_PINP(C)::QAR(B)+P(C),XB(c)
        • B(c);OGATE::QAR(B)+P(C),XB(c)
      • Refutation
        • P(b);
    • Try
      • S(D);
      • Threat
        • QAR(B)+P(C)
      • Vars
        • K(a);P-FLIGHT::QAR(B)+P(C)
        • B(c);OGATE,P_PINP(C)::QAR(B)+P(C),XB(c)
        • B(c);OGATE::QAR(B)+P(C),XB(c)
      • Refutation
        • P(b);
    • Try
      • S(D);
      • Threat
        • QAR(B)+P(C)
      • Vars
        • K(a);P-FLIGHT::QAR(B)+P(C)
        • B(c);OGATE,P_PINP(C)::QAR(B)+P(C),XB(c)
        • B(c);OGATE::QAR(B)+P(C),XB(c)
      • Refutation
        • P(b);
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);P-FLIGHT,XP(C)
  • Actual
    • S(D);
    • Threat
      • QAR(B)+P(C)
    • Vars
      • K(a);P-FLIGHT::QAR(B)+P(C)
      • P(b);SBLOCK::S(D),XB(c)
      • B(c);OGATE,P_PINP(C)::QAR(B)+P(C),XB(c)
      • B(c);OGATE::QAR(B)+P(C),XB(c)
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