MESON Chess Problem Database

Problem Display
PID: 245125 (2b1K3/1nB4B/5pN1/3Qpk2/2NP3P/3P1pR1/4r2n/8 w - - 0 1)

Hermanson, Halvar

Scacchi e Scienze Applicate, 1986

2b1K3/1nB4B/5pN1/3Qpk2/2NP3P/3P1pR1/4r2n/8

#2

10 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Se3#
    • 1...Rb2
      • 2.Se3#
    • 1...Rc2
      • 2.Se3#
    • 1...Rd2
      • 2.Se3#
    • 1...Rf2
      • 2.Se3#
    • 1...Rg2
      • 2.Se3#
    • 1...Re3
      • 2.Sxe3#
    • 1...Re4
      • 2.dxe4#
    • 1...Bd7+
      • 2.Qxd7#
    • 1...Sg4
      • 2.Rxf3#
    • 1...Sa5
      • 2.Sd6#
    • 1...Sc5
      • 2.Sd6#
    • 1...Sd6+
      • 2.Sxd6#
    • 1...Sd8
      • 2.Sd6#
  • Tries
    • 1.Bxe5?
      • threat
        • 2.Sf4#
        • 2.Se7#
        • 2.Sf8#
        • 2.Sh8#
      • 1...Bd7+
        • 2.Qxd7#
      • 1...Sd6+
        • 2.Sxd6#
      • 1...fxe5
        • 2.Qf7#
      • 1...Rxe5+!
    • 1.Qxf3+?
      • 1...Ke6
        • 2.Sf8#
        • 2.Bg8#
        • 2.d5#
      • 1...Sxf3!
    • 1.Qe4+?
      • 1...Ke6
        • 2.Sf4#
        • 2.Sf8#
        • 2.Bg8#
        • 2.d5#
      • 1...Rxe4!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Rg5#
      • 1...Bd7+
        • 2.Qxd7#
      • 1...Sd6+
        • 2.Sxd6#
      • 1...exd4+
        • 2.Se7#
      • 1...Rg2
        • 2.Se3#
      • 1...Sg4
        • 2.Rxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • R(a);N_GUARD::S(C)
    • R(a);N_GUARD::S(C),XR(a)
    • R(a);OGATE::P(A),XR(a)
    • B(h);CHECK,N_GUARD::QAB(F),XB(h)
    • S(b);N_GUARD,SBLOCK::R(B),XP(c)
    • S(g);N_GUARD::S(C)
    • S(g);CHECK,N_GUARD::S(C),XS(g)
  • Tries
    • Try
      • B(H);P_SPINB(H),XP(d)
      • Threat
        • DUALS(4)
      • Vars
        • B(h);CHECK,N_GUARD::QAB(F),XB(h)
        • S(g);CHECK,N_GUARD::S(C),XS(g)
        • P(f);OGATEB,P_SPINP(f),XB(H)::QAR2(F)
      • Refutation
        • R(a);CHECK,P_SPINR(a),XB(H)
    • Try
      • Q(F);CHECK,N_PINP(d),XP(c)
      • Refutation
        • S(b);XQ(F)
    • Try
      • Q(F);CHECK,N_PINP(d)
      • Refutation
        • R(a);XQ(F)
  • Actual
    • Q(F);N_PINP(d),P_PINP(f)
    • Threat
      • R1(B)
    • Vars
      • B(h);CHECK,N_GUARD::QAB(F),XB(h)
      • S(g);CHECK,N_GUARD::S(C),XS(g)
      • P(d);CHECK,XP(D)::B(I)+S(G),DCHECK
      • R(a);N_GUARD::S(C)
      • S(b);N_GUARD,SBLOCK::R(B),XP(c)
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