MESON Chess Problem Database

Problem Display
PID: 137400 (8/3QK3/8/4N3/R2Bk1B1/8/2q2P2/4r1n1 w - - 0 1)

Hermanson, Halvar

1st Prize, Avesta-Posten, 1928

8/3QK3/8/4N3/R2Bk1B1/8/2q2P2/4r1n1

#2

7 + 4

881 The Australasian Chess Review 1929
274 diagrammes 1973

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Bb2#
    • 1...Qc1
      • 2.Bc3#
    • 1...Qb2
      • 2.Bxb2#
    • 1...Qc3
      • 2.Bxc3#
  • Tries
    • 1.Sf3?
      • threat
        • 2.Qf5#
      • 1...Kf4+
        • 2.Be3#
        • 2.Be5#
      • 1...Qc5+
        • 2.Bxc5#
      • 1...Qc7
        • 2.Bc5#
      • 1...Qc8
        • 2.Bc5#
      • 1...Kd3+!
    • 1.Ba1+?
      • 1...Qc4
        • 2.Rxc4#
      • 1...Qxa4!
    • 1.Bb2+?
      • 1...Qc4
        • 2.Rxc4#
      • 1...Qxa4!
    • 1.Bf3+?
      • 1...Kf4
        • 2.Qg4#
      • 1...Sxf3!
    • 1.Qd5+?
      • 1...Kf4
        • 2.Be3#
      • 1...Kxd5!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Qf5#
      • 1...Kd3+
        • 2.Be5#
      • 1...Kf4+
        • 2.Be3#
      • 1...Qc5+
        • 2.Bxc5#
      • 1...Qxf2
        • 2.Bxf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • Q(c);N_GUARD::R(B)+B(C)
    • Q(c);N_GUARD::R(B)+B(C),XQ(c)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAB1(F)
      • Vars
        • Q(c);CHECK,N_GUARD::R(B)+B(C),XQ(c)
        • Q(c);N_GUARD,P_PINQ(F)::R(B)+B(C)
        • Q(c);N_GUARD::R(B)+B(C)
      • Refutation
        • K(d);CHECK,S_FLIGHT
    • Try
      • B(C);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::R(B),XQ(c)
      • Refutation
        • Q(c);XR(B)
    • Try
      • B(C);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::R(B),XQ(c)
      • Refutation
        • Q(c);XR(B)
    • Try
      • B(D);CHECK
      • Vars
        • K(d);P-FLIGHT,P_PINS(E)::QAR1(F)
      • Refutation
        • S(b);XB(D)
    • Try
      • Q(F);CHECK
      • Vars
        • K(d);P-FLIGHT,P_PINS(E)::R(B)+B(C),DCHECK
      • Refutation
        • K(d);P_PINS(E),S_FLIGHT,XQ(F)
  • Actual
    • S(E);
    • Threat
      • QAB1(F)
    • Vars
      • K(d);CHECK,S_FLIGHT::QAR(F)+B(C)
      • K(d);CHECK,P-FLIGHT::R(B)+B(C),DCHECK
      • Q(c);CHECK,N_GUARD::R(B)+B(C),XQ(c)
      • Q(c);OGATE,XP(A)::R(B)+B(C),XQ(c)
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