MESON Chess Problem Database

Problem Display
PID: 101945 (8/4N3/2p1p3/Rpk1P3/2N3nR/2P2p2/Q4P1p/7K w - - 0 1)

Hoek, Willem

Schweizerische Arbeiter Schach Journal, 1953

8/4N3/2p1p3/Rpk1P3/2N3nR/2P2p2/Q4P1p/7K

#2

9 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf2+
      • 2.Qxf2#
    • 1...Se3
      • 2.Qa3#
    • 1...Sxe5
      • 2.Qa3#
    • 1...Sf6
      • 2.Qa3#
    • 1...Sh6
      • 2.Qa3#
  • Tries
    • 1.Ra6?
      • threat
        • 2.Rxc6#
      • 1...Sxf2+
        • 2.Qxf2#
      • 1...bxc4
        • 2.Qa5#
      • 1...b4
        • 2.Ra5#
      • 1...Sxe5!
    • 1.Qb2?
      • threat
        • 2.Qb4#
      • 1...Sxf2+
        • 2.Qxf2#
      • 1...Kxc4!
    • 1.Qd2?
      • threat
        • 2.Qd4#
      • 1...Sxf2+
        • 2.Qxf2#
      • 1...Kxc4!
    • 1.Qe2?
      • 1...Sxf2+
        • 2.Qxf2#
      • 1...Sxe5
        • 2.Qe3#
        • 2.Qxe5#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sf6
        • 2.Qe3#
      • 1...Sh6
        • 2.Qe3#
      • 1...fxe2!
  • Keys
    • 1.Ra8!
      • 1...Sxf2+
        • 2.Qxf2#
      • 1...Sxe5
        • 2.Qa7#
      • 1...bxc4
        • 2.Qa5#
      • 1...b4
        • 2.Ra5#
      • 1...Se3
        • 2.Qa7#
      • 1...Sf6
        • 2.Qa7#
      • 1...Sh6
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 4
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(c);CHECK,OGATE,XP(C)::QAB(B),XS(c)
    • S(c);::QAB(B)
    • S(c);XP(H)::QAB(B)
  • Tries
    • Try
      • R(G);N_PINP(d)
      • Threat
        • R1(G),XP(f)
      • Vars
        • S(c);CHECK,OGATE,XP(C)::QAB(B),XS(c)
        • P(d);OGATEB,SBLOCK,XS(E)::QAR2(B)
        • P(d);OGATEB::R(G)
      • Refutation
        • S(c);XP(H)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • S(c);CHECK,OGATE,XP(C)::QAB(B),XS(c)
      • Refutation
        • K(e);N_SPINP(d),P-FLIGHT,P_SPINS(c),XS(E)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • S(c);CHECK,OGATE,XP(C)::QAB(B),XS(c)
      • Refutation
        • K(e);N_SPINP(d),P-FLIGHT,P_SPINS(c),XS(E)
    • Try
      • Q(B);
      • Vars
        • S(c);CHECK,OGATE,XP(C)::QAB(B),XS(c)
        • S(c);N_GUARD::QAB(B),XS(c)
        • S(c);N_GUARD::QAB(B)
      • Refutation
        • P(b);XQ(B)
  • Actual
    • R(G);N_PINP(d)
    • Vars
      • S(c);CHECK,OGATE,XP(C)::QAB(B),XS(c)
      • S(c);XP(H)::QAB(B)
      • P(d);OGATEB,SBLOCK,XS(E)::QAR2(B)
      • P(d);OGATEB::R(G)
      • S(c);::QAB(B)
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