MESON Chess Problem Database

Problem Display
PID: 190141 (4N3/7K/7p/3pkB1r/6p1/3Q4/6N1/8 w - - 0 1)

Herland, Sigmund

Magyar Sakkvilag, 1913

4N3/7K/7p/3pkB1r/6p1/3Q4/6N1/8

#2

5 + 5

5454 Near Snap 2019
6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf5
      • 2.Qe3#
    • 1...d4
      • 2.Qe4#
      • 2.Qb5#
  • Tries
    • 1.Be6?
      • threat
        • 2.Qe3#
        • 2.Qxd5#
      • 1...Rh3
        • 2.Qxd5#
      • 1...d4
        • 2.Qe2#
      • 1...Kxe6!
    • 1.Qc3+?
      • 1...d4
        • 2.Qa5#
        • 2.Qc5#
      • 1...Kxf5!
    • 1.Qd4+?
      • 1...Kxf5
        • 2.Qxd5#
      • 1...Kxd4!
  • Keys
    • 1.Qd2!
      • threat
        • 2.Qf4#
      • 1...Kxf5
        • 2.Qxd5#
      • 1...Rxf5
        • 2.Qe3#
      • 1...d4
        • 2.Qa5#

Anticipated by 224495(1887), 51031(1913)

This anticipates 121520(1948), 224811(2004)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(d);SBLOCK,XB(C)::QAR2(B)
  • Tries
    • Try
      • B(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(d);::QAR1(B),XP(b)
        • P(b);SBLOCK::QAR(B)
      • Refutation
        • K(c);P-FLIGHT,XB(C)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(c);P-FLIGHT,XB(C)
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);P-FLIGHT,XB(C)::QAR2(B),XP(b)
      • Refutation
        • K(c);S_FLIGHT,XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • K(c);P-FLIGHT,XB(C)::QAR2(B),XP(b)
      • R(d);SBLOCK,XB(C)::QAR2(B)
      • P(b);OGATEB,SBLOCK::QAR(B)
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