MESON Chess Problem Database

Problem Display
PID: 107722 (5Qnb/1p4r1/1KRp4/4kP2/1pP1N3/1N2PPPB/4p3/1b1q4 w - - 0 1)

Benedek, Attila

Pedagogusok Lapja, 1979

5Qnb/1p4r1/1KRp4/4kP2/1pP1N3/1N2PPPB/4p3/1b1q4

#2

11 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc2
      • 2.Qxd6#
    • 1...Qxb3
      • 2.Qxd6#
    • 1...Qc1
      • 2.Qxd6#
    • 1...Qe1
      • 2.Qxd6#
    • 1...Qf1
      • 2.Qxd6#
    • 1...Qg1
      • 2.Qxd6#
    • 1...Qh1
      • 2.Qxd6#
    • 1...Qd4+
      • 2.exd4#
    • 1...Bd3
      • 2.Qxd6#
    • 1...Bxe4
      • 2.f4#
    • 1...Sf6
      • 2.Qxf6#
    • 1...Sh6
      • 2.Qf6#
    • 1...Se7
      • 2.Qf6#
    • 1...d5
      • 2.Re6#
      • 2.Qd6#
  • Tries
    • 1.Sf2?
      • threat
        • 2.f4#
      • 1...Qd4+
        • 2.exd4#
      • 1...Bxf5
        • 2.Qxf5#
      • 1...Rg4
        • 2.Sxg4#
      • 1...Rf7!
    • 1.Sec5?
      • threat
        • 2.f4#
      • 1...dxc5
        • 2.Re6#
      • 1...Rg4
        • 2.Sd7#
      • 1...Qf1
        • 2.Qxd6#
      • 1...Qd4
        • 2.exd4#
      • 1...Rf7!
    • 1.Sxd6?
      • threat
        • 2.f4#
      • 1...Qd4+
        • 2.exd4#
      • 1...Qxd6
        • 2.Qxd6#
      • 1...Bxf5
        • 2.Qxf5#
      • 1...Rf7
        • 2.Sxf7#
      • 1...Qf1
        • 2.Rc5#
      • 1...Rg4!
    • 1.Rc5+?
      • 1...Qd5
        • 2.Rxd5#
        • 2.Qxd6#
      • 1...d5
        • 2.Qd6#
      • 1...dxc5!
    • 1.Qxg7+?
      • 1...Sf6
        • 2.Qe7#
      • 1...Bxg7!
  • Keys
    • 1.Sbc5!
      • threat
        • 2.f4#
      • 1...dxc5
        • 2.Re6#
      • 1...Qf1
        • 2.Qxd6#
      • 1...Rg4
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 12
  • Sets
    • Q(b);N_GUARD::QAB1(K),XP(f)
    • Q(b);N_GUARD,XS(A)::QAB1(K),XP(f)
    • Q(b);N_GUARD,P_PINP(B)::QAB1(K),XP(f)
    • Q(b);CHECK,OGATE::P(B),XQ(b)
    • B(a);S_CUTQ(b)::QAB1(K),XP(f)
    • B(a);SBLOCK,XS(G)::P(C)
    • S(i);N_GUARD::QAB1(K),XS(i)
    • S(i);N_GUARD::QAB1(K)
  • Tries
    • Try
      • S(G);
      • Threat
        • P(C)
      • Vars
        • Q(b);CHECK,OGATE::P(B),XQ(b)
        • B(a);OGATE,XP(H)::QAR1(K),XB(a)
        • R(h);N_GUARD::S(G),XR(h)
      • Refutation
        • R(h);
    • Try
      • S(G);
      • Threat
        • P(C)
      • Vars
        • P(f);OGATE,XS(G)::R1(J)
        • R(h);N_GUARD::S(G)
        • Q(b);N_GUARD::QAB1(K),XP(f)
        • Q(b);OGATE,P_PINS(G)::P(B),XQ(b)
      • Refutation
        • R(h);
    • Try
      • S(G);XP(f)
      • Threat
        • P(C)
      • Vars
        • Q(b);CHECK,OGATE::P(B),XQ(b)
        • Q(b);OGATE,P_PINR(J),XS(G)::QAB1(K),XQ(b)
        • B(a);OGATE,XP(H)::QAR1(K),XB(a)
        • R(h);N_GUARD::S(G),XR(h)
        • Q(b);N_GUARD::R(J)
      • Refutation
        • R(h);
    • Try
      • R(J);CHECK
      • Vars
        • P(f);P_SPINP(f)::QAB1(K)
      • Refutation
        • P(f);XR(J)
    • Try
      • Q(K);CHECK,XR(h)
      • Vars
        • S(i);N_GUARD,P_SPINS(i)::QAR2(K)
      • Refutation
        • B(j);XQ(K)
  • Actual
    • S(A);
    • Threat
      • P(C)
    • Vars
      • P(f);OGATE,XS(A)::R1(J)
      • Q(b);N_GUARD::QAB1(K),XP(f)
      • R(h);N_GUARD::S(A)
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