MESON Chess Problem Database

Problem Display
PID: 172072 (3R4/N2q1p2/5p1K/2pnp3/2PkbPR1/p2P2p1/1r1Pn3/B3NB2 w - - 0 1)

Apro, Laszlo

Zaszlonk, 1938

3R4/N2q1p2/5p1K/2pnp3/2PkbPR1/p2P2p1/1r1Pn3/B3NB2

#2

11 + 12

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg4
      • 2.Sb5#
      • 2.Sc6#
    • 1...Qb5
      • 2.Sxb5#
    • 1...Qf5
      • 2.Sb5#
      • 2.Sc6#
    • 1...Qc6
      • 2.Sxc6#
    • 1...Qe6
      • 2.Sb5#
    • 1...Qc8
      • 2.Sb5#
    • 1...Qd6
      • 2.Sb5#
    • 1...Qc7
      • 2.Sb5#
    • 1...Qe7
      • 2.Sb5#
      • 2.Sc6#
    • 1...Qxd8
      • 2.Sb5#
      • 2.Sc6#
    • 1...Sc1
      • 2.Sc2#
    • 1...Sg1
      • 2.Sc2#
    • 1...Sexf4
      • 2.Sc2#
    • 1...Se3
      • 2.Sb5#
    • 1...Sb4
      • 2.Sb5#
    • 1...Sdxf4
      • 2.Sb5#
    • 1...Sb6
      • 2.Sb5#
    • 1...Se7
      • 2.Sb5#
  • Tries
    • 1.Bxb2+?
      • 1...Sec3
        • 2.Sc2#
      • 1...Sdc3
        • 2.Sb5#
      • 1...axb2!
    • 1.Rxd7?
      • threat
        • 2.Sb5#
        • 2.Sc6#
      • 1...exf4
        • 2.Sc6#
      • 1...Sc3
        • 2.Sc6#
      • 1...Bxd3!
  • Keys
    • 1.f5!
      • threat
        • 2.Rxe4#
      • 1...Qxf5
        • 2.Sb5#
        • 2.Sc6#
        • 2.Rxd5#
      • 1...Sec3
        • 2.Sf3#
      • 1...Sef4
        • 2.Sc2#
      • 1...Sdc3
        • 2.Sc6#
      • 1...Sdf4
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 12
  • Sets
    • Q(k);N_GUARD,P_SPINS(h)::S(J),XQ(k)
    • Q(k);N_GUARD,P_SPINS(h)::S(J)
    • Q(k);N_GUARD::S(J)
    • S(b);::S(B)
    • S(b);XP(G)::S(B)
    • S(h);P_SPINQ(k)::S(J)
    • S(h);P_SPINQ(k),XP(G)::S(J)
  • Tries
    • Try
      • B(A);CHECK,XR(a)
      • Vars
        • S(b);P_SPINS(b)::S(B)
        • S(h);P_SPINQ(k),P_SPINS(h)::S(J)
      • Refutation
        • P(c);XB(A)
    • Try
      • R(K);P_PINS(h),XQ(k)
      • Threat
        • DUALS(2)
      • Vars
        • P(i);XP(G)::S(J)
        • S(b);N_SPINR(a)::S(J)
      • Refutation
        • B(f);XP(E)
  • Actual
    • P(G);P_PINB(f)
    • Threat
      • R1(H),XB(f)
    • Vars
      • S(b);N_SPINR(a)::S(B)
      • S(b);N_SPINB(f)::S(B)
      • S(h);N_SPINR(a),P_SPINQ(k)::S(J)
      • S(h);N_SPINB(f),P_SPINQ(k)::S(J)
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