MESON Chess Problem Database

Problem Display
PID: 183388 (3Q4/N1P1Kp2/3N4/P2k1p2/1qpn4/B4PP1/3Rn3/4R1rB w - - 0 1)

Weenink, Henri Gerard Maria

Good Companions (March), 1923

3Q4/N1P1Kp2/3N4/P2k1p2/1qpn4/B4PP1/3Rn3/4R1rB

#2

12 + 8

16055 HGM Weenink (Euwe/Niemeijer/Rueb/Trotsenburg) 1932

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Sb7#
    • 1...Ke5
      • 2.f4#
    • 1...Qxd2
      • 2.Sxf7#
    • 1...Qc3
      • 2.Sxf7#
    • 1...Qxa5
      • 2.Sxf7#
    • 1...Qxd6+
      • 2.Qxd6#
    • 1...Qb1
      • 2.Sxf7#
    • 1...Qb2
      • 2.Sxf7#
    • 1...Qb3
      • 2.Sxf7#
    • 1...Qb7
      • 2.Sxf7#
  • Tries
    • 1.Bxb4?
      • threat
        • 2.Sxf7#
      • 1...Ke5
        • 2.Sxc4#
        • 2.Sxf7#
        • 2.f4#
      • 1...f6
        • 2.Sf7#
      • 1...c3!
    • 1.c8Q?
      • threat
        • 2.Qxf5#
      • 1...Qxd6+
        • 2.Qxd6#
      • 1...Ke5
        • 2.f4#
      • 1...Qxd2
        • 2.Sxc4#
        • 2.Sxf7#
        • 2.Qc5#
      • 1...Sxg3
        • 2.Qc6#
      • 1...Qb1
        • 2.Sxc4#
        • 2.Sxf7#
        • 2.Qc5#
      • 1...f4
        • 2.Qf5#
      • 1...Qb7+!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qxf5#
      • 1...Qxd6+
        • 2.Qxd6#
      • 1...Kc5
        • 2.Sb7#
      • 1...Ke5
        • 2.f4#
      • 1...Qxd2
        • 2.Sxf7#
      • 1...Sxg3
        • 2.Qc6#
      • 1...Qb1
        • 2.Sxf7#
      • 1...f4
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • K(f);N_PINS(H),N_SPINS(e),P-FLIGHT,P_SPINQ(c)::S(H)
    • K(f);N_SPINS(e),P-FLIGHT,P_SPINS(b)::P(E)
    • Q(c);N_PINS(H),N_SPINS(e),XR(C)::QAR(L)+S(H),XP(h)
    • Q(c);N_PINS(H)::QAR(L)+S(H),XP(h)
    • Q(c);N_PINS(H),XP(G)::QAR(L)+S(H),XP(h)
    • Q(c);CHECK,OGATE,P_SPINQ(c),XS(H)::QAR1(L),XQ(c)
    • Q(c);N_PINS(H),P_PINP(J)::QAR(L)+S(H),XP(h)
  • Tries
    • Try
      • B(D);N_SPINS(H),XQ(c)
      • Threat
        • QAR(L)+S(H),XP(h)
      • Vars
        • P(h);::QAR(L)+S(H)
      • Refutation
        • P(d);
    • Try
      • P(J);
      • Threat
        • QAR2(J),XP(g)
      • Vars
        • Q(c);CHECK,OGATE,P_SPINQ(c),XS(H)::QAR1(L),XQ(c)
        • K(f);N_SPINS(e),P-FLIGHT,P_SPINS(b)::P(E)
        • S(b);XP(F)::QAB1(J)
        • P(g);::QAR2(J)
      • Refutation
        • Q(c);CHECK,N_PINS(H)
  • Actual
    • Q(L);
    • Threat
      • QAR2(L),XP(g)
    • Vars
      • Q(c);CHECK,OGATE,P_SPINQ(c),XS(H)::QAR1(L),XQ(c)
      • K(f);N_PINS(H),N_SPINS(e),P-FLIGHT,P_SPINQ(c)::S(H)
      • K(f);N_SPINS(e),P-FLIGHT,P_SPINS(b)::P(E)
      • Q(c);N_PINS(H),N_SPINS(e),XR(C)::QAR(L)+S(H),XP(h)
      • S(b);XP(F)::QAB1(L)
      • Q(c);N_PINS(H)::QAR(L)+S(H),XP(h)
      • P(g);::QAR2(L)
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