MESON Chess Problem Database

Problem Display
PID: 90018 (1QK5/8/6p1/1pb1nP2/1p1k4/1PRpN1r1/2PP1r2/4R1BB w - - 0 1)

Pfaue, Hans

Die Schwalbe, 1949

1QK5/8/6p1/1pb1nP2/1p1k4/1PRpN1r1/2PP1r2/4R1BB

#2

11 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf5
      • 2.Sxf5#
    • 1...Bb6
      • 2.Qd6#
      • 2.Qxb6#
    • 1...Bd6
      • 2.Qxd6#
    • 1...Ba7
      • 2.Qd6#
      • 2.Qxa7#
    • 1...Sf3
      • 2.Qf4#
    • 1...Sc4
      • 2.Rxd3#
    • 1...Sg4
      • 2.Rxd3#
    • 1...Sc6
      • 2.Rxd3#
    • 1...Sd7
      • 2.Rxd3#
    • 1...Sf7
      • 2.Rxd3#
    • 1...dxc2
      • 2.Sxc2#
    • 1...gxf5
      • 2.Sxf5#
  • Tries
    • 1.Sf1?
      • threat
        • 2.Qxe5#
      • 1...Sf3
        • 2.Rxd3#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Sc4
        • 2.Qf4#
      • 1...Sg4
        • 2.Qf4#
      • 1...Sc6
        • 2.Qf4#
      • 1...Sd7
        • 2.Qf4#
      • 1...Sf7
        • 2.Qf4#
      • 1...Re3!
    • 1.Sc4?
      • threat
        • 2.Qxe5#
      • 1...Sxc4
        • 2.Qf4#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Sf3
        • 2.Rxd3#
      • 1...Sg4
        • 2.Qf4#
      • 1...Sc6
        • 2.Qf4#
      • 1...Sd7
        • 2.Qf4#
      • 1...Sf7
        • 2.Qf4#
      • 1...Re3!
    • 1.Sg4?
      • threat
        • 2.Qxe5#
      • 1...Sxg4
        • 2.Qf4#
      • 1...Sf3
        • 2.Rxd3#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Sc4
        • 2.Qf4#
      • 1...Sc6
        • 2.Qf4#
      • 1...Sd7
        • 2.Qf4#
      • 1...Sf7
        • 2.Qf4#
      • 1...Re3!
    • 1.Sd5?
      • threat
        • 2.Qxe5#
      • 1...Sf3
        • 2.Rxd3#
      • 1...Re3
        • 2.dxe3#
      • 1...Sc4
        • 2.Qf4#
      • 1...Sg4
        • 2.Qf4#
      • 1...Sc6
        • 2.Qf4#
      • 1...Sd7
        • 2.Qf4#
      • 1...Sf7
        • 2.Qf4#
      • 1...Bd6!
  • Keys
    • 1.Sd1!
      • threat
        • 2.Qxe5#
      • 1...Sf3
        • 2.Rxd3#
      • 1...Re3
        • 2.dxe3#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Sc4
        • 2.Qf4#
      • 1...Sg4
        • 2.Qf4#
      • 1...Sc6
        • 2.Qf4#
      • 1...Sd7
        • 2.Qf4#
      • 1...Sf7
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 6
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(a);XP(I)::B(B)+S(H),DCHECK,XR(a)
    • B(g);N_GUARD::QAR2(J),XB(g)
    • S(h);OGATE::QAR2(J)
    • S(h);N_GUARD::R1(G),XP(b)
    • P(b);XP(D)::S(H),XP(b)
    • P(i);XP(I)::S(H),XP(i)
  • Tries
    • Try
      • S(H);P_PINR(a)
      • Threat
        • QAB1(J),XS(h)
      • Vars
        • S(h);N_GUARD,S_CUTR(c)::R1(G),XP(b)
        • B(g);N_GUARD::QAR2(J),XB(g)
        • S(h);OGATE::QAR2(J)
      • Refutation
        • R(c);N_SPINR(a)
    • Try
      • S(H);P_PINR(a)
      • Threat
        • QAB1(J),XS(h)
      • Vars
        • S(h);OGATE,XS(H)::QAR2(J)
        • B(g);N_GUARD::QAR2(J),XB(g)
        • S(h);N_GUARD,S_CUTR(c)::R1(G),XP(b)
        • S(h);OGATE::QAR2(J)
      • Refutation
        • R(c);N_SPINR(a)
    • Try
      • S(H);P_PINR(a)
      • Threat
        • QAB1(J),XS(h)
      • Vars
        • S(h);OGATE,XS(H)::QAR2(J)
        • S(h);N_GUARD,S_CUTR(c)::R1(G),XP(b)
        • B(g);N_GUARD::QAR2(J),XB(g)
        • S(h);OGATE::QAR2(J)
      • Refutation
        • R(c);N_SPINR(a)
    • Try
      • S(H);P_PINR(a)
      • Threat
        • QAB1(J),XS(h)
      • Vars
        • S(h);N_GUARD,S_CUTR(c)::R1(G),XP(b)
        • R(c);N_SPINR(a),OGATE::P(E),XR(c)
        • S(h);OGATE::QAR2(J)
      • Refutation
        • B(g);
  • Actual
    • S(H);P_PINR(a)
    • Threat
      • QAB1(J),XS(h)
    • Vars
      • S(h);N_GUARD,S_CUTR(c)::R1(G),XP(b)
      • R(c);N_SPINR(a),OGATE::P(E),XR(c)
      • B(g);N_GUARD::QAR2(J),XB(g)
      • S(h);OGATE::QAR2(J)
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