MESON Chess Problem Database

Problem Display
PID: 21188 (8/1Q6/6N1/2P2p2/2PPp2p/4kB1P/6K1/n2R4 w - - 0 1)

Weenink, Henri Gerard Maria

3rd HM., Good Companions (March), 1917

8/1Q6/6N1/2P2p2/2PPp2p/4kB1P/6K1/n2R4

#2

9 + 5

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

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Qb3#
    • 1...Sb3
      • 2.Qxb3#
    • 1...exf3+
      • 2.Qxf3#
    • 1...f4
      • 2.Qxe4#
  • Tries
    • 1.Kg1?
      • 1...exf3
        • 2.Qe7#
      • 1...Sc2
        • 2.Qb3#
      • 1...Sb3
        • 2.Qxb3#
      • 1...f4
        • 2.Qxe4#
      • 1...Kxf3!
    • 1.Sf4?
      • threat
        • 2.Sd5#
      • 1...exf3+
        • 2.Qxf3#
      • 1...Kxf4!
    • 1.Se7?
      • threat
        • 2.Sd5#
      • 1...exf3+
        • 2.Qxf3#
      • 1...Kf4!
    • 1.Bh5?
      • 1...Sc2
        • 2.Qb3#
      • 1...Sb3
        • 2.Qxb3#
      • 1...f4!
    • 1.Qb1?
      • threat
        • 2.Qc1#
      • 1...Sb3
        • 2.Qxb3#
      • 1...exf3+!
    • 1.Qb2?
      • threat
        • 2.Qc1#
        • 2.Qc3#
        • 2.Qd2#
        • 2.Qe2#
        • 2.Qf2#
      • 1...Sc2
        • 2.Qc1#
        • 2.Qc3#
        • 2.Qb3#
      • 1...Sb3
        • 2.Qc3#
        • 2.Qe2#
        • 2.Qf2#
        • 2.Qxb3#
      • 1...exf3+!
    • 1.Qb4?
      • threat
        • 2.Qe1#
        • 2.Qd2#
        • 2.Qc3#
      • 1...Sc2
        • 2.Qd2#
        • 2.Qc3#
        • 2.Qb3#
      • 1...Sb3
        • 2.Qe1#
        • 2.Qc3#
        • 2.Qxb3#
      • 1...exf3+!
    • 1.Qc7?
      • threat
        • 2.Qf4#
      • 1...f4
        • 2.Qxf4#
      • 1...exf3+!
    • 1.Qb8?
      • threat
        • 2.Qf4#
      • 1...f4
        • 2.Qxf4#
      • 1...exf3+!
  • Keys
    • 1.Kf1!
      • 1...Kxf3
        • 2.Rd3#
      • 1...exf3
        • 2.Qe7#
      • 1...Sc2
        • 2.Qb3#
      • 1...Sb3
        • 2.Qxb3#
      • 1...f4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAR(I)
    • S(a);N_GUARD::QAR(I),XS(a)
    • P(c);CHECK,OGATE,XB(C)::QAR1(I),XP(c)
    • P(e);N_GUARD::QAR1(I),XP(c)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • P(c);OGATEB,SBLOCK,XB(C)::QAR(I)
        • S(a);N_GUARD::QAR(I)
        • S(a);N_GUARD::QAR(I),XS(a)
        • P(e);N_GUARD::QAR1(I),XP(c)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(c),XB(C)
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • P(c);CHECK,OGATE,XB(C)::QAR1(I),XP(c)
      • Refutation
        • K(b);S_FLIGHT,XS(H)
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • P(c);CHECK,OGATE,XB(C)::QAR1(I),XP(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(C);
      • Vars
        • S(a);N_GUARD::QAR(I)
        • S(a);N_GUARD::QAR(I),XS(a)
      • Refutation
        • P(e);
    • Try
      • Q(I);
      • Threat
        • QAB(I)
      • Vars
        • S(a);N_GUARD::QAR(I),XS(a)
      • Refutation
        • P(c);CHECK,XB(C)
    • Try
      • Q(I);
      • Threat
        • DUALS(5)
      • Refutation
        • P(c);CHECK,XB(C)
    • Try
      • Q(I);
      • Threat
        • DUALS(3)
      • Refutation
        • P(c);CHECK,XB(C)
    • Try
      • Q(I);
      • Threat
        • QAB1(I)
      • Vars
        • P(e);::QAB1(I),XP(e)
      • Refutation
        • P(c);CHECK,XB(C)
    • Try
      • Q(I);
      • Threat
        • QAB1(I)
      • Vars
        • P(e);::QAB1(I),XP(e)
      • Refutation
        • P(c);CHECK,XB(C)
  • Actual
    • K(B);S_FLIGHT
    • Vars
      • K(b);P-FLIGHT,P_SPINP(c),XB(C)::R(A)
      • P(c);OGATEB,SBLOCK,XB(C)::QAR(I)
      • S(a);N_GUARD::QAR(I)
      • S(a);N_GUARD::QAR(I),XS(a)
      • P(e);N_GUARD::QAR1(I),XP(c)
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