MESON Chess Problem Database

Problem Display
PID: 116355 (8/3R1K2/kq6/5Q1R/2P5/8/8/8 w - - 0 1)

Hermanson, Halvar

Sztalinvarosi Hirlap, 1956

8/3R1K2/kq6/5Q1R/2P5/8/8/8

#2

5 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.Qa5#
      • 2.Qb5#
    • 1...Qe3
      • 2.Qa5#
      • 2.Qb5#
    • 1...Qd4
      • 2.Qa5#
      • 2.Qb5#
    • 1...Qa5
      • 2.Qxa5#
    • 1...Qa7
      • 2.Qa5#
      • 2.Qb5#
    • 1...Qd8
      • 2.Qb5#
    • 1...Qb1
      • 2.Qa5#
    • 1...Qb2
      • 2.Qa5#
    • 1...Qb3
      • 2.Qa5#
    • 1...Qb5
      • 2.Qxb5#
    • 1...Qc6
      • 2.Qa5#
    • 1...Qd6
      • 2.Qa5#
      • 2.Qb5#
    • 1...Qe6+
      • 2.Qxe6#
    • 1...Qf6+
      • 2.Qxf6#
    • 1...Qg6+
      • 2.Qxg6#
    • 1...Qh6
      • 2.Rxh6#
      • 2.Qa5#
      • 2.Qb5#
    • 1...Qb7
      • 2.Qa5#
    • 1...Qb8
      • 2.Qa5#
  • Tries
    • 1.Qe6?
      • 1...Qc6
        • 2.Qxc6#
      • 1...Qd6
        • 2.Qxd6#
      • 1...Qxe6+!
    • 1.Qg6?
      • 1...Qe6+
        • 2.Qxe6#
      • 1...Qf6+
        • 2.Qxf6#
      • 1...Qc6
        • 2.Qxc6#
      • 1...Qd6
        • 2.Qxd6#
      • 1...Qxg6+!
    • 1.Qf6?
      • 1...Qe6+
        • 2.Qxe6#
      • 1...Qc6
        • 2.Qxc6#
      • 1...Qd6
        • 2.Qxd6#
      • 1...Qxf6+!
  • Keys
    • 1.Rh6!
      • threat
        • 2.Qb5#
      • 1...Qe6+
        • 2.Rxe6#
      • 1...Qf6+
        • 2.Rxf6#
      • 1...Qg6+
        • 2.Rxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 9
  • Sets
    • Q(b);N_GUARD::QAR1(B),XQ(b)
    • Q(b);N_GUARD::QAB1(B)
    • Q(b);N_GUARD::QAR1(B)
    • Q(b);N_GUARD,P_PINP(A)::QAR1(B)
    • Q(b);N_GUARD::QAB1(B),XQ(b)
    • Q(b);CHECK,OGATEB::QAR(B),XQ(b)
    • Q(b);N_GUARD,P_PINR(D)::QAR1(B)
  • Tries
    • Try
      • Q(B);P_PINQ(b)
      • Vars
        • Q(b);OGATEB::QAR2(B),XQ(b)
        • Q(b);OGATEB::QAR(B),XQ(b)
      • Refutation
        • Q(b);CHECK,N_SPINQ(b),XQ(B)
    • Try
      • Q(B);P_PINQ(b)
      • Vars
        • Q(b);CHECK,OGATEB::QAR(B),XQ(b)
        • Q(b);OGATEB::QAR2(B),XQ(b)
        • Q(b);OGATEB::QAR(B),XQ(b)
      • Refutation
        • Q(b);CHECK,N_SPINQ(b),XQ(B)
    • Try
      • Q(B);P_PINQ(b)
      • Vars
        • Q(b);CHECK,OGATEB::QAR(B),XQ(b)
        • Q(b);OGATEB::QAR2(B),XQ(b)
        • Q(b);OGATEB::QAR(B),XQ(b)
      • Refutation
        • Q(b);CHECK,N_SPINQ(b),XQ(B)
  • Actual
    • R(C);P_PINQ(b)
    • Threat
      • QAB1(B)
    • Vars
      • Q(b);CHECK,OGATEB::R(C),XQ(b)
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