MESON Chess Problem Database

Problem Display
PID: 99549 (8/8/2p1R3/8/r5p1/N2p4/2qkN1K1/B4Q2 w - - 0 1)

Hermanson, Halvar

Magyar Sakkelet, 1963

8/8/2p1R3/8/r5p1/N2p4/2qkN1K1/B4Q2

#2

6 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Bc3#
    • 1...Qd1
      • 2.Bc3#
    • 1...Qb3
      • 2.Qc1#
    • 1...Qc1
      • 2.Qxc1#
    • 1...Qa2
      • 2.Bc3#
      • 2.Qc1#
    • 1...Qc3
      • 2.Bxc3#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Qe1#
      • 1...Qd1
        • 2.Qxd1#
      • 1...Qb1
        • 2.Scxb1#
      • 1...Qc1
        • 2.Qf2#
      • 1...Re4!
    • 1.Qd1+?
      • 1...Qxd1
        • 2.Bc3#
      • 1...Kxd1!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Qe1#
      • 1...Qd1
        • 2.Qf4#
      • 1...Qb1
        • 2.Sxb1#
      • 1...Qc1
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • Q(a);N_GUARD::B(A)
    • Q(a);N_GUARD::QAB1(B)
    • Q(a);N_GUARD::QAB1(B),XQ(a)
    • Q(a);N_GUARD::B(A),XQ(a)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB1(B)
      • Vars
        • Q(a);N_GUARD::QAR1(B),XQ(a)
        • Q(a);N_GUARD::S(C),XQ(a)
        • Q(a);SBLOCK::QAR2(B)
      • Refutation
        • R(d);
    • Try
      • Q(B);CHECK
      • Vars
        • Q(a);SBLOCK,XQ(B)::B(A)
      • Refutation
        • K(b);P-FLIGHT,P_PINS(C),XQ(B)
  • Actual
    • S(C);
    • Threat
      • QAB1(B)
    • Vars
      • Q(a);SBLOCK::QAB(B)
      • Q(a);N_GUARD::S(E),XQ(a)
      • Q(a);N_GUARD::S(C)
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