MESON Chess Problem Database

Problem Display
PID: 18935 (3N3K/7B/1N1B4/1QP1P2R/2rkr3/2p1p3/q1p1p3/7b w - - 0 1)

Hermanson, Halvar

2nd Prize, Problem TT, 1959

3N3K/7B/1N1B4/1QP1P2R/2rkr3/2p1p3/q1p1p3/7b

#2

9 + 9

3174 The Two-move Chess Problem Tradition and Development 1966

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Qxc4#
    • 1...Qa1
      • 2.Qxc4#
    • 1...Qb2
      • 2.Qxc4#
    • 1...Qa3
      • 2.Qxc4#
    • 1...Qa5
      • 2.Qxc4#
    • 1...Qa7
      • 2.Qxc4#
    • 1...Qa8
      • 2.Qxc4#
    • 1...Ra4
      • 2.Sc6#
    • 1...Rb4
      • 2.Sc6#
    • 1...Rxc5
      • 2.Bxc5#
    • 1...Rf4
      • 2.Se6#
    • 1...Rg4
      • 2.Se6#
    • 1...Rh4
      • 2.Se6#
    • 1...Rxe5
      • 2.Bxe5#
  • Tries
    • 1.c6?
      • threat
        • 2.Qd5#
      • 1...Rxc6
        • 2.Sxc6#
      • 1...Rxe5
        • 2.Bxe5#
        • 2.Qxe5#
      • 1...Qa5
        • 2.Qxc4#
      • 1...Ra4
        • 2.Bc5#
      • 1...Rb4
        • 2.Bc5#
      • 1...Rc5
        • 2.Bxc5#
      • 1...Rf4
        • 2.Se6#
      • 1...Rg4
        • 2.Se6#
      • 1...Rh4
        • 2.Se6#
      • 1...Kd3!
  • Keys
    • 1.e6!
      • threat
        • 2.Rd5#
      • 1...Kd3
        • 2.Rd5#
      • 1...Rxc5
        • 2.Bxc5#
      • 1...Rxe6
        • 2.Sxe6#
      • 1...Qa8
        • 2.Qxc4#
      • 1...Ra4
        • 2.Sc6#
      • 1...Rb4
        • 2.Sc6#
      • 1...Rf4
        • 2.Be5#
      • 1...Rg4
        • 2.Be5#
      • 1...Rh4
        • 2.Be5#
      • 1...Re5
        • 2.Bxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(b);N_GUARD::QAR1(A),XR(g)
    • Q(b);N_GUARD,P_PINS(H)::QAR1(A),XR(g)
    • R(g);::S(H)
    • R(g);OGATE,XP(B)::B(F),XR(g)
    • R(i);::S(H)
    • R(i);OGATE,XP(C)::B(F),XR(i)
  • Tries
    • Try
      • P(B);
      • Threat
        • QAR1(A)
      • Vars
        • R(g);XP(B)::S(H),XR(g)
        • Q(b);N_GUARD::QAR1(A),XR(g)
        • R(g);N_GUARD::B(F)
        • R(g);N_GUARD::B(F),XR(g)
        • R(i);::S(H)
      • Refutation
        • K(h);P-FLIGHT,P_SPINR(g)
  • Actual
    • P(C);
    • Threat
      • R1(D)
    • Vars
      • K(h);P-FLIGHT,P_SPINR(g)::R(D)
      • R(g);OGATE,XP(B)::B(F),XR(g)
      • R(i);XP(C)::S(H),XR(i)
      • Q(b);N_GUARD,P_PINS(H)::QAR1(A),XR(g)
      • R(g);::S(H)
      • R(i);N_GUARD::B(F)
      • R(i);N_GUARD::B(F),XR(i)
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