MESON Chess Problem Database

Problem Display
PID: 97948 (r1B5/5Q2/2p2N2/r3RqP1/4NkP1/8/1B1P2K1/8 w - - 0 1)

Hermanson, Halvar

Problemas, 1975

r1B5/5Q2/2p2N2/r3RqP1/4NkP1/8/1B1P2K1/8

#2

10 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4+
      • 2.Sxe4#
    • 1...Qxg4+
      • 2.Sxg4#
    • 1...Qg6
      • 2.Sd5#
      • 2.Sh5#
    • 1...Qh7
      • 2.Sd5#
      • 2.Sh5#
      • 2.Sxh7#
    • 1...Qxg5
      • 2.Sd5#
      • 2.Sh5#
    • 1...Qxf6
      • 2.Qxf6#
    • 1...Ra1
      • 2.Rxf5#
    • 1...Ra2
      • 2.Rxf5#
    • 1...Ra3
      • 2.Rxf5#
    • 1...Ra4
      • 2.Rxf5#
    • 1...R5a6
      • 2.Rxf5#
    • 1...R5a7
      • 2.Rxf5#
    • 1...c5
      • 2.Rxf5#
  • Tries
    • 1.Sf2?
      • threat
        • 2.Sh3#
      • 1...Qe4+
        • 2.S6xe4#
      • 1...Qxg4+
        • 2.S6xg4#
      • 1...Qd3
        • 2.Sxd3#
        • 2.S6e4#
        • 2.Sd5#
        • 2.Sh5#
      • 1...Qh7
        • 2.Sd5#
        • 2.Sh5#
        • 2.Sxh7#
      • 1...Ra3
        • 2.Rxf5#
      • 1...Kxg5!
    • 1.Sd5+?
      • 1...Rxd5
        • 2.Qxf5#
      • 1...cxd5
        • 2.Qxf5#
      • 1...Kxg4!
    • 1.Qh5?
      • threat
        • 2.Qh2#
      • 1...Qxe4+
        • 2.Rxe4#
      • 1...Qxg4+
        • 2.Qxg4#
      • 1...Ra3
        • 2.Rxf5#
      • 1...Qh7!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qf1#
      • 1...Qxe4+
        • 2.Qxe4#
      • 1...Qxg4+
        • 2.Sg3#
      • 1...Ra1
        • 2.Rxf5#
      • 1...Ra3
        • 2.Rxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 6
  • Sets
    • Q(c);CHECK,XS(D)::QAR(I)+S(H),XQ(c)
    • Q(c);CHECK,XP(E)::QAR(I)+S(H),XQ(c)
    • Q(c);OGATE,P_SPINQ(c),XS(H)::QAR2(I),XQ(c)
    • R(b);N_GUARD::R1(F),XQ(c)
    • P(d);S_CUTR(b)::R1(F),XQ(c)
  • Tries
    • Try
      • S(D);
      • Threat
        • S(D)
      • Vars
        • Q(c);CHECK::QAR(I)+S(H),XQ(c)
        • Q(c);CHECK,XP(E)::QAR(I)+S(H),XQ(c)
        • R(b);N_GUARD::R1(F),XQ(c)
      • Refutation
        • K(a);P_SPINQ(c),S_FLIGHT,XP(G)
    • Try
      • S(H);CHECK,P_PINQ(c)
      • Vars
        • R(b);XS(H)::QAR1(I),XQ(c)
        • P(d);XS(H)::QAR1(I),XQ(c)
      • Refutation
        • K(a);P-FLIGHT,XP(E)
    • Try
      • Q(I);
      • Threat
        • QAB(I)
      • Vars
        • Q(c);CHECK,OGATE,XS(D)::R1(F),XQ(c)
        • Q(c);CHECK,OGATE,XP(E)::QAR1(I),XQ(c)
        • R(b);N_GUARD::R1(F),XQ(c)
      • Refutation
        • Q(c);
  • Actual
    • Q(I);
    • Threat
      • QAR(I)
    • Vars
      • Q(c);CHECK,OGATE,P_SPINQ(c),XS(D)::QAR1(I),XQ(c)
      • Q(c);CHECK,N_GUARD,XP(E)::QAR(I)+S(D)
      • R(b);N_GUARD::R1(F),XQ(c)
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