MESON Chess Problem Database

Problem Display
PID: 242596 (K1B5/1n3N2/2n5/1Qpk4/1P1pp3/1NP5/b2Rq3/8 w - - 0 1)

Hermanson, Halvar

Tidskrift for Schack, 1979

K1B5/1n3N2/2n5/1Qpk4/1P1pp3/1NP5/b2Rq3/8

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.c4#
    • 1...Qf3
      • 2.c4#
    • 1...Qg4
      • 2.c4#
    • 1...Qh5
      • 2.c4#
    • 1...Qe1
      • 2.c4#
    • 1...Qxd2
      • 2.c4#
    • 1...Qf2
      • 2.c4#
    • 1...Qg2
      • 2.c4#
    • 1...Qh2
      • 2.c4#
    • 1...Qe3
      • 2.c4#
    • 1...Sxb4
      • 2.Rxd4#
    • 1...Sca5
      • 2.Rxd4#
    • 1...Se5
      • 2.Rxd4#
    • 1...Sa7
      • 2.Rxd4#
    • 1...Se7
      • 2.Rxd4#
    • 1...Sb8
      • 2.Rxd4#
    • 1...Scd8
      • 2.Rxd4#
    • 1...Sba5
      • 2.Qxc5#
    • 1...Sd6
      • 2.Qxc5#
    • 1...Sbd8
      • 2.Qxc5#
    • 1...d3
      • 2.c4#
  • Tries
    • 1.Sxd4?
      • threat
        • 2.Be6#
      • 1...Sxd4
        • 2.Rxd4#
      • 1...Qg4
        • 2.Sxc6#
      • 1...Scd8
        • 2.Sxe2#
      • 1...Sbd8
        • 2.Qxc5#
      • 1...e3!
    • 1.Sa5?
      • threat
        • 2.Qxc6#
      • 1...Sxb4
        • 2.Rxd4#
      • 1...Scxa5
        • 2.Rxd4#
      • 1...Sbxa5
        • 2.Qxc5#
      • 1...Se5
        • 2.Rxd4#
      • 1...Sa7
        • 2.Rxd4#
      • 1...Se7
        • 2.Rxd4#
      • 1...Sb8
        • 2.Rxd4#
      • 1...Scd8
        • 2.Rxd4#
      • 1...Sbd8
        • 2.Qxc5#
      • 1...Qxb5!
  • Keys
    • 1.Sxc5!
      • threat
        • 2.Be6#
      • 1...Sxc5
        • 2.Qxc5#
      • 1...Qg4
        • 2.Sxb7#
      • 1...Scd8
        • 2.Rxd4#
      • 1...Sbd8
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 18
  • Sets
    • Q(b);N_GUARD::P(C)
    • Q(b);N_GUARD,N_SPINP(c),P_SPINP(e),XR(A)::P(C)
    • S(g);N_GUARD,XP(D)::R1(A),XP(c)
    • S(g);N_GUARD::R1(A),XP(c)
    • S(h);N_GUARD::QAR1(E),XP(e)
    • P(c);S_CUTQ(b)::P(C)
  • Tries
    • Try
      • S(B);P_PINP(e),XP(c)
      • Threat
        • B(H)
      • Vars
        • S(g);OGATE,P_SPINS(g),XS(B)::R1(A),XS(g)
        • Q(b);N_GUARD::R(A)+S(B),XS(g)
        • S(g);N_GUARD::R(A)+S(B),XQ(b)
        • S(h);N_GUARD::QAR1(E),XP(e)
      • Refutation
        • P(d);
    • Try
      • S(B);
      • Threat
        • QAB1(E),XS(g)
      • Vars
        • S(g);N_GUARD,XP(D)::R1(A),XP(c)
        • S(g);N_GUARD,XS(B)::R1(A),XP(c)
        • S(h);N_GUARD,XS(B)::QAR1(E),XP(e)
        • S(g);N_GUARD::R1(A),XP(c)
        • S(h);N_GUARD::QAR1(E),XP(e)
      • Refutation
        • Q(b);XQ(E)
  • Actual
    • S(B);XP(e)
    • Threat
      • B(H)
    • Vars
      • S(h);OGATE,P_SPINS(h),XS(B)::QAR1(E),XS(h)
      • Q(b);N_GUARD::QAR(E)+S(B),XS(h)
      • S(g);N_GUARD::R1(A),XP(c)
      • S(h);N_GUARD::QAR(E)+S(B)
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