MESON Chess Problem Database

Problem Display
PID: 44663 (B2n1Nn1/3Q1p2/3Pr2p/4Pk2/1p4NK/2P1p1Pp/2r5/2b5 w - - 0 1)

Feldbrugge, Johannes Hermanus Bernardus

Het Schaakleven, 1932

B2n1Nn1/3Q1p2/3Pr2p/4Pk2/1p4NK/2P1p1Pp/2r5/2b5

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...f6
      • 2.Qh7#
  • Tries
    • 1.Qc6?
      • threat
        • 2.Qf3#
        • 2.Qe4#
      • 1...Rxe5
        • 2.Qf3#
      • 1...Rf2
        • 2.Qe4#
      • 1...Sb7
        • 2.Qf3#
      • 1...Sf6
        • 2.Qf3#
      • 1...e2
        • 2.Qe4#
      • 1...Sxc6!
    • 1.Qxf7+?
      • 1...Rf6
        • 2.Qh5#
      • 1...Sf6
        • 2.Qg6#
      • 1...Sxf7!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qd3#
      • 1...Rxc3
        • 2.Qf1#
      • 1...Rxe5
        • 2.Qxe5#
      • 1...Rxd6
        • 2.exd6#
      • 1...Rd2
        • 2.Sxe3#
      • 1...Sf6
        • 2.Sxh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • P(i);OGATE::QAB(G)
  • Tries
    • Try
      • Q(G);N_PINR(g)
      • Threat
        • DUALS(2)
      • Vars
        • R(g);XP(E)::QAR2(G)
        • R(b);::QAB1(G)
        • S(j);::QAR2(G)
        • S(k);::QAR2(G)
        • P(c);::QAB1(G)
      • Refutation
        • S(j);XQ(G)
    • Try
      • Q(G);CHECK,N_PINR(g),XP(i)
      • Vars
        • R(g);P_SPINR(g)::QAR2(G)
        • S(k);P_SPINS(k),S_CUTR(g)::QAB1(G)
      • Refutation
        • S(j);XQ(G)
  • Actual
    • Q(G);N_PINR(g)
    • Threat
      • QAB(G)
    • Vars
      • R(b);N_GUARD,XP(A)::QAR(G)
      • R(g);OGATE,P_SPINR(g),XP(E)::QAR1(G),XR(g)
      • R(g);OGATE,XP(F)::QAR(G)+P(E),XR(g)
      • R(b);S_CUTB(a)::S(C),XP(c)
      • S(k);N_GUARD,S_CUTR(g)::S(C),XP(h)
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