MESON Chess Problem Database

Problem Display
PID: 155624 (1BBR1r2/1q2R3/1p4pb/4N2N/2pPk1pP/2P5/3Prp2/1KnQ4 w - - 0 1)

Kiss, Janos

1/2 Prize, BTSB, 1954

1BBR1r2/1q2R3/1p4pb/4N2N/2pPk1pP/2P5/3Prp2/1KnQ4

#2

12 + 11

22 Deutsche Schachzeitung 1955

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Sg3#
    • 1...Rf5
      • 2.Bxb7#
    • 1...Rxd8
      • 2.Qh1#
    • 1...Re8
      • 2.Qh1#
    • 1...Rg8
      • 2.Qh1#
    • 1...Rh8
      • 2.Qh1#
    • 1...Bf4
      • 2.Qh1#
    • 1...Sa2
      • 2.Qc2#
    • 1...Sb3
      • 2.Qc2#
  • Tries
    • 1.Sd3+?
      • 1...Kxd3
        • 2.Qc2#
      • 1...Kf3
        • 2.Bxb7#
        • 2.Qh1#
      • 1...Qxe7!
    • 1.Sf3+?
      • 1...Kd3
        • 2.Qc2#
      • 1...Kxf3
        • 2.Bxb7#
        • 2.Qh1#
      • 1...Qxe7!
    • 1.Sxc4+?
      • 1...Kd3
        • 2.Sb2#
      • 1...Kf3
        • 2.Bxb7#
        • 2.Qh1#
      • 1...Qxe7!
    • 1.Sxg4+?
      • 1...Kd3
        • 2.Qc2#
      • 1...Kf3
        • 2.Qh1#
      • 1...Qxe7!
    • 1.Sc6+?
      • 1...Kd3
        • 2.Sb4#
        • 2.Qc2#
      • 1...Kf3
        • 2.Qh1#
      • 1...Qxe7!
    • 1.Sxg6+?
      • 1...Kd3
        • 2.Qc2#
      • 1...Kf3
        • 2.Bxb7#
        • 2.Qh1#
      • 1...Qxe7!
    • 1.Sf7+?
      • 1...Kd3
        • 2.Qc2#
      • 1...Kf3
        • 2.Bxb7#
        • 2.Qh1#
      • 1...Qxe7!
    • 1.Qxe2+?
      • 1...Be3
        • 2.Qxe3#
      • 1...Sxe2!
  • Keys
    • 1.Sd7+!
      • 1...Kd3
        • 2.Qc2#
      • 1...Kf3
        • 2.Bxb7#
        • 2.Qh1#
      • 1...Kd5
        • 2.Bxb7#
      • 1...Kf5
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • R(k);SBLOCK::S(H)
    • R(k);SBLOCK::B(K),XQ(j)
    • R(k);N_GUARD,XR(L)::QAB(B)
    • R(k);N_GUARD::QAB(B)
    • B(i);S_CUTR(k)::QAB(B)
    • S(a);N_GUARD::QAB(B)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(e);S_FLIGHT,XS(G)::QAB1(B)
      • Refutation
        • Q(j);XR(I)
    • Try
      • S(G);CHECK
      • Vars
        • K(e);S_FLIGHT::QAB1(B)
      • Refutation
        • Q(j);XR(I)
    • Try
      • S(G);CHECK,XP(d)
      • Vars
        • K(e);S_FLIGHT::S(G)
      • Refutation
        • Q(j);XR(I)
    • Try
      • S(G);CHECK,XP(f)
      • Vars
        • K(e);S_FLIGHT::QAB1(B)
        • K(e);P_SPINR(b),S_FLIGHT::QAB(B)
      • Refutation
        • Q(j);XR(I)
    • Try
      • S(G);CHECK
      • Vars
        • K(e);P_SPINR(b),S_FLIGHT::QAB(B)
      • Refutation
        • Q(j);XR(I)
    • Try
      • S(G);CHECK,XP(h)
      • Vars
        • K(e);S_FLIGHT::QAB1(B)
      • Refutation
        • Q(j);XR(I)
    • Try
      • S(G);CHECK
      • Vars
        • K(e);S_FLIGHT::QAB1(B)
      • Refutation
        • Q(j);XR(I)
    • Try
      • Q(B);CHECK,XR(b)
      • Vars
        • B(i);N_GUARD,P_SPINB(i)::QAR1(B),XB(i)
      • Refutation
        • S(a);XQ(B)
  • Actual
    • S(G);CHECK
    • Vars
      • K(e);S_FLIGHT::QAB1(B)
      • K(e);S_FLIGHT::B(K),XQ(j)
      • K(e);S_FLIGHT::S(H)
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