MESON Chess Problem Database

Problem Display
PID: 42665 (8/2p5/2P1p2K/8/NRNkB2p/1P1qRp2/3BPQ2/2n2r2 w - - 0 1)

Pachl, Franz

2nd Prize, Sachsische Zeitung, 1984

8/2p5/2P1p2K/8/NRNkB2p/1P1qRp2/3BPQ2/2n2r2

#2

11 + 8

3748 FIDE Album (1983-1985) 1992
133 The Problemist Supplement 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Bc3#
    • 1...Qxe2
      • 2.Bc3#
    • 1...Qxc4
      • 2.Bc3#
    • 1...Qxe4
      • 2.Rd3#
    • 1...Qc3
      • 2.Bxc3#
    • 1...Qxe3+
      • 2.Qxe3#
  • Tries
    • 1.Scb2+?
      • 1...Qc4
        • 2.Bc3#
      • 1...Ke5!
    • 1.Sa3+?
      • 1...Qc4
        • 2.Bc3#
      • 1...Ke5!
    • 1.Sa5+?
      • 1...Qc4
        • 2.Bc3#
      • 1...Ke5!
    • 1.Se5+?
      • 1...Qc4
        • 2.Sxf3#
        • 2.Bc3#
      • 1...Kxe5!
    • 1.Scb6+?
      • 1...Qc4
        • 2.Bc3#
      • 1...Ke5!
    • 1.Sd6+?
      • 1...Qc4
        • 2.Bc3#
      • 1...Ke5!
    • 1.Qg3?
      • threat
        • 2.Qe5#
      • 1...Qxe3+
        • 2.Sxe3#
      • 1...Qxc4
        • 2.Rxc4#
      • 1...Qxe4
        • 2.Scb6#
      • 1...e5
        • 2.Qxe5#
      • 1...hxg3!
    • 1.Qxh4?
      • threat
        • 2.Qd8#
      • 1...Qxe3+
        • 2.Bxe3#
      • 1...Qxc4
        • 2.Bxf3#
      • 1...Qxe4
        • 2.Qxe4#
      • 1...Rh1!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Qe5#
      • 1...Qxe3+
        • 2.Sxe3#
      • 1...Qxc4
        • 2.Rxc4#
      • 1...Qxe4
        • 2.Scb6#
      • 1...e5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(c);N_GUARD::B(A)
    • Q(c);N_GUARD,XP(B)::B(A)
    • Q(c);N_GUARD,P_SPINQ(c),XS(H)::B(A)
    • Q(c);SBLOCK,XB(I)::QAB(C)+R(E),DCHECK
    • Q(c);N_GUARD::B(A),XQ(c)
    • Q(c);CHECK,OGATE,P_SPINQ(c),XR(E)::QAB1(C),XQ(c)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • Q(c);P_SPINQ(c)::B(A)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • S(H);CHECK
      • Vars
        • Q(c);P_SPINQ(c)::B(A)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • S(H);CHECK
      • Vars
        • Q(c);P_SPINQ(c)::B(A)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • S(H);CHECK
      • Refutation
        • K(e);S_FLIGHT,XS(H)
    • Try
      • S(H);CHECK
      • Vars
        • Q(c);P_SPINQ(c)::B(A)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • S(H);CHECK
      • Vars
        • Q(c);P_SPINQ(c)::B(A)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • Q(c);CHECK,XR(E)::R(G)+S(H),XQ(c)
        • Q(c);OGATE,P_SPINQ(c),XS(H)::R1(G),XQ(c)
        • Q(c);N_GUARD,XB(I)::R(G)+S(H)
        • P(g);::QAB1(C),XP(g)
      • Refutation
        • P(f);XQ(C)
    • Try
      • Q(C);XP(f)
      • Threat
        • QAR(C)
      • Vars
        • Q(c);CHECK,OGATE,XR(E)::B(A),XQ(c)
        • Q(c);N_GUARD,P_SPINQ(c),XS(H)::QAR(C)+B(I),XP(d)
        • Q(c);OGATE,P_SPINQ(c),XB(I)::QAR1(C),XQ(c)
      • Refutation
        • R(b);P_PINQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • Q(c);CHECK,XR(E)::R(G)+S(H),XQ(c)
      • Q(c);OGATE,P_SPINQ(c),XS(H)::R1(G),XQ(c)
      • Q(c);N_GUARD,XB(I)::R(G)+S(H)
      • P(g);::QAB1(C),XP(g)
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