MESON Chess Problem Database

Problem Display
PID: 102441 (1B1N4/2rp2pK/BQ6/2pP4/2Pk4/4RPn1/4P1N1/b3n3 w - - 0 1)

Overkamp, Petrus

Europe Echecs, 1965

1B1N4/2rp2pK/BQ6/2pP4/2Pk4/4RPn1/4P1N1/b3n3

#2

11 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rc6
      • 2.Be5#
    • 1...Ra7
      • 2.Be5#
    • 1...Rb7
      • 2.Be5#
    • 1...Rc8
      • 2.Be5#
    • 1...Bb2
      • 2.Qxb2#
    • 1...d6
      • 2.Se6#
    • 1...g5
      • 2.Qf6#
    • 1...g6
      • 2.Qf6#
  • Tries
    • 1.Sc6+?
      • 1...Rxc6
        • 2.Be5#
      • 1...dxc6!
    • 1.Qxc5+?
      • 1...Rxc5
        • 2.Be5#
      • 1...Kxc5!
    • 1.Qxc7?
      • threat
        • 2.Qe5#
      • 1...Sd3
        • 2.Rxd3#
      • 1...d6
        • 2.Sc6#
        • 2.Se6#
        • 2.Qxg7#
      • 1...Sxf3!
    • 1.Qb1?
      • threat
        • 2.Qxa1#
      • 1...Sxg2
        • 2.Qd3#
      • 1...Sxe2
        • 2.Qe4#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Se4
        • 2.Qxe4#
      • 1...Rb7
        • 2.Be5#
      • 1...Bb2
        • 2.Qxb2#
      • 1...Sc2
        • 2.Qd1#
      • 1...Bc3!
    • 1.Qe6?
      • threat
        • 2.Qe5#
      • 1...Sxf3
        • 2.Rd3#
      • 1...dxe6
        • 2.Sxe6#
      • 1...Sd3
        • 2.Rxd3#
      • 1...Se4
        • 2.Qxe4#
      • 1...d6!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qxg7#
      • 1...Sxg2
        • 2.Qd3#
      • 1...Sxf3
        • 2.Qd3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Se4
        • 2.Qxe4#
      • 1...Rc6
        • 2.Be5#
      • 1...Sf5
        • 2.Qg4#
      • 1...Sh5
        • 2.Qe4#
      • 1...d6
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 6
  • Sets
    • R(f);OGATE::B(J)
    • B(a);N_GUARD::QAB(H),XB(a)
    • P(g);N_GUARD::S(K)
    • P(h);N_GUARD::QAB(H)
  • Tries
    • Try
      • S(K);CHECK
      • Vars
        • R(f);OGATE,XS(K)::B(J)
      • Refutation
        • P(g);XS(K)
    • Try
      • Q(H);CHECK,XP(e)
      • Vars
        • R(f);OGATE,SBLOCK,XQ(H)::B(J)
      • Refutation
        • K(d);S_FLIGHT,XQ(H)
    • Try
      • Q(H);N_PINP(e),XR(f)
      • Threat
        • QAB1(H)
      • Vars
        • S(b);N_GUARD::R1(C),XS(b)
      • Refutation
        • S(b);XP(D)
    • Try
      • Q(H);N_PINP(e)
      • Threat
        • QAB(H),XB(a)
      • Vars
        • S(b);N_GUARD,XS(B)::QAR1(H)
        • S(c);N_GUARD,XP(A)::QAR1(H)
        • S(b);N_GUARD::QAR1(H),XS(b)
        • S(c);N_GUARD::QAR1(H),XS(c)
        • R(f);OGATE::B(J)
        • B(a);N_GUARD::QAB(H),XB(a)
        • S(b);N_GUARD::QAR(H)
      • Refutation
        • B(a);
    • Try
      • Q(H);N_PINP(e)
      • Threat
        • QAB1(H)
      • Vars
        • S(b);N_GUARD,XP(D)::R1(C)
        • P(g);XQ(H)::S(K),XP(g)
        • S(b);N_GUARD::R1(C),XS(b)
        • S(c);N_GUARD::QAR1(H),XS(c)
      • Refutation
        • P(g);
  • Actual
    • Q(H);N_PINP(e)
    • Threat
      • QAB(H),XP(h)
    • Vars
      • S(b);N_GUARD,XS(B)::QAR1(H)
      • S(b);N_GUARD,XP(D)::QAR1(H)
      • S(b);N_GUARD::QAR1(H),XS(b)
      • S(c);N_GUARD::QAR1(H),XS(c)
      • R(f);OGATE::B(J)
      • S(c);N_GUARD::QAR(H)
      • S(c);N_GUARD::QAR1(H)
      • P(g);N_GUARD::S(K)
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