MESON Chess Problem Database

Problem Display
PID: 21463 (1q6/1N2b3/2N1br2/3n4/4P2Q/R1Pk4/B3Rn2/B3K3 w - - 0 1)

Weenink, Henri Gerard Maria

3rd Prize, Good Companions (March), 1919

1q6/1N2b3/2N1br2/3n4/4P2Q/R1Pk4/B3Rn2/B3K3

#2

10 + 7

3132 The Good Companion Two-Mover 1922
1577 Jaarboek 1931
16055 HGM Weenink (Euwe/Niemeijer/Rueb/Trotsenburg) 1932

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Sxe5#
    • 1...Qa7
      • 2.Se5#
    • 1...Qxb7
      • 2.Se5#
    • 1...Qa8
      • 2.Se5#
    • 1...Qc8
      • 2.Se5#
    • 1...Qd8
      • 2.Se5#
    • 1...Qe8
      • 2.Se5#
    • 1...Qf8
      • 2.Se5#
    • 1...Qg8
      • 2.Se5#
    • 1...Qh8
      • 2.Se5#
    • 1...Bc5
      • 2.Sxc5#
    • 1...Bd8
      • 2.Sc5#
    • 1...Sxe4
      • 2.Qxe4#
    • 1...Sxc3
      • 2.Rxc3#
    • 1...Se3
      • 2.Rd2#
    • 1...Sb4
      • 2.c4#
    • 1...Sf4
      • 2.Qg3#
    • 1...Sc7
      • 2.Se5#
  • Tries
    • 1.Sb4+?
      • 1...Sxb4
        • 2.c4#
      • 1...Bxb4!
    • 1.Sca5?
      • threat
        • 2.Bb1#
        • 2.Bc4#
      • 1...Qxb7
        • 2.Bc4#
      • 1...Qc7
        • 2.Bb1#
      • 1...Qc8
        • 2.Bb1#
      • 1...Se3
        • 2.Rd2#
      • 1...Sb4
        • 2.c4#
      • 1...Sf4
        • 2.Bb1#
        • 2.Qg3#
      • 1...Sb6
        • 2.Bb1#
      • 1...Sc7
        • 2.Bb1#
      • 1...Sxc3!
    • 1.Qxf6?
      • threat
        • 2.Qd4#
      • 1...Bxf6
        • 2.Sc5#
      • 1...Qe5
        • 2.Sxe5#
      • 1...Qa7
        • 2.Se5#
      • 1...Qh8
        • 2.Se5#
      • 1...Bc5
        • 2.Sxc5#
      • 1...Sxf6!
    • 1.c4+?
      • 1...Sc3
        • 2.Rxc3#
      • 1...Bxa3!
  • Keys
    • 1.Sba5!
      • threat
        • 2.Bc4#
      • 1...Qb1+
        • 2.Bxb1#
      • 1...Sxc3
        • 2.Rxc3#
      • 1...Qb3
        • 2.Se5#
      • 1...Qb4
        • 2.Se5#
      • 1...Qb5
        • 2.Se5#
      • 1...Se3
        • 2.Rd2#
      • 1...Sb4
        • 2.c4#
      • 1...Sf4
        • 2.Qg3#
      • 1...Sb6
        • 2.Bb1#
      • 1...Sc7
        • 2.Se5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 13
  • Sets
    • Q(g);N_GUARD::S(I),XQ(g)
    • Q(g);N_GUARD::S(I)
    • Q(g);N_GUARD,XS(J)::S(I)
    • B(f);N_GUARD::S(J),XB(f)
    • B(f);N_GUARD::S(J)
    • S(a);OGATE,XP(G)::QAB1(H),XS(a)
    • S(c);OGATE,P_SPINS(c),XP(F)::R1(E),XS(c)
    • S(c);SBLOCK::R1(D)
    • S(c);N_GUARD,S_CUTB(f)::R(E)+P(F)
    • S(c);N_GUARD,S_CUTQ(g),S_CUTR(e)::QAR(H)
    • S(c);S_CUTQ(g)::S(I)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • S(c);XS(I)::R(E)+P(F)
      • Refutation
        • B(f);P_PINP(F),XS(I)
    • Try
      • S(I);
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);XS(J)::B(C)
        • Q(g);::B(C)
        • S(c);SBLOCK::R1(D)
        • S(c);N_GUARD,S_CUTB(f)::R(E)+P(F)
        • S(c);::B(C)
      • Refutation
        • S(c);P_SPINS(c),XP(F)
    • Try
      • Q(H);XR(e)
      • Threat
        • QAR1(H)
      • Vars
        • B(f);N_GUARD,XQ(H)::S(J)
        • Q(g);N_GUARD::S(I),XQ(g)
        • Q(g);N_GUARD::S(I)
        • B(f);N_GUARD::S(J),XB(f)
      • Refutation
        • S(c);XQ(H)
    • Try
      • P(F);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::R1(E),XS(c)
      • Refutation
        • B(f);XR(E)
  • Actual
    • S(J);
    • Threat
      • B(C)
    • Vars
      • Q(g);CHECK,N_GUARD::B(C),XQ(g)
      • S(c);OGATE,P_SPINS(c),XP(F)::R1(E),XS(c)
      • Q(g);N_GUARD::S(I)
      • Q(g);N_GUARD,P_PINP(F)::S(I)
      • S(c);SBLOCK::R1(D)
      • S(c);N_GUARD,S_CUTB(f),S_CUTQ(g)::R(E)+P(F)
      • S(c);N_GUARD,S_CUTQ(g),S_CUTR(e)::QAR(H)
      • S(c);S_CUTQ(g)::B(C)
      • S(c);S_CUTQ(g)::S(I)
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