MESON Chess Problem Database

Problem Display
PID: 196933 (6Q1/8/1KP2Bq1/p7/8/4p3/NP1N4/k7 w - - 0 1)

Muye, M

Tijdschrift vd NSB, 1919

6Q1/8/1KP2Bq1/p7/8/4p3/NP1N4/k7

#2

7 + 4

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qh7
      • 2.b4#
    • 1...Qg1
      • 2.b4#
    • 1...Qg2
      • 2.b4#
  • Tries
    • 1.Sc1?
      • threat
        • 2.Qa2#
      • 1...Qxg8
        • 2.b3#
        • 2.b4#
      • 1...Qb1
        • 2.Sdb3#
      • 1...Qf7!
    • 1.Qxg6?
      • threat
        • 2.Qb1#
      • 1...Kxa2
        • 2.Qb1#
      • 1...exd2!
  • Keys
    • 1.Sb4!
      • threat
        • 2.Qa2#
      • 1...Qxg8
        • 2.b3#
      • 1...axb4
        • 2.Qa8#
      • 1...Qb1
        • 2.Sb3#
      • 1...Qf7
        • 2.Qg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • Q(d);N_GUARD::B(F)+P(B)
  • Tries
    • Try
      • S(A);
      • Threat
        • QAR1(G)
      • Vars
        • Q(d);P_PINP(B),SBLOCK::S(C)
      • Refutation
        • Q(d);
    • Try
      • Q(G);XQ(d)
      • Threat
        • QAR1(G)
      • Vars
        • K(a);P-FLIGHT,XS(A)::QAB1(G)
      • Refutation
        • P(b);XS(C)
  • Actual
    • S(A);
    • Threat
      • QAR1(G)
    • Vars
      • Q(d);N_GUARD,XQ(G)::B(F)+P(B)
      • P(c);OGATEB,XS(A)::QAB(G)
      • Q(d);SBLOCK::S(C)
      • Q(d);OGATE::QAR(G)
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