MESON Chess Problem Database

Problem Display
PID: 240118 (b2N3n/RnPqk2N/3RP3/p1p4B/3r1BPb/3p1Q2/8/7K w - - 0 1)

Zilahi, Zoltan

Skakbladet, 1937

b2N3n/RnPqk2N/3RP3/p1p4B/3r1BPb/3p1Q2/8/7K

#2

11 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.c8S#
    • 1...Qb5
      • 2.c8S#
    • 1...Qc6
      • 2.Sxc6#
    • 1...Qxe6
      • 2.Sc6#
    • 1...Qc8
      • 2.Sc6#
    • 1...Qe8
      • 2.c8S#
    • 1...Qxd8
      • 2.cxd8Q#
      • 2.cxd8B#
    • 1...Ra4
      • 2.Rxd7#
    • 1...Rb4
      • 2.Rxd7#
    • 1...Rc4
      • 2.Rxd7#
    • 1...Re4
      • 2.Rxd7#
    • 1...Rxf4
      • 2.Rxd7#
    • 1...Sxd8
      • 2.c8S#
  • Tries
    • 1.Bh2?
      • threat
        • 2.Qf8#
      • 1...Qxd8
        • 2.cxd8Q#
        • 2.cxd8B#
      • 1...Sxd8
        • 2.c8S#
      • 1...Rf4
        • 2.Rxd7#
      • 1...Sg6
        • 2.Qf7#
      • 1...Sf7
        • 2.Qxf7#
      • 1...Qc6
        • 2.Sxc6#
      • 1...Qe8
        • 2.c8S#
      • 1...Bf6
        • 2.Qxf6#
      • 1...Sxd6!
    • 1.Be5?
      • threat
        • 2.Qf8#
      • 1...Qxd8
        • 2.cxd8Q#
        • 2.cxd8B#
      • 1...Sxd8
        • 2.c8S#
      • 1...Sg6
        • 2.Qf7#
      • 1...Sf7
        • 2.Qxf7#
      • 1...Qc6
        • 2.Sxc6#
      • 1...Qe8
        • 2.c8S#
      • 1...Rf4
        • 2.Rxd7#
      • 1...Bf6
        • 2.Qxf6#
      • 1...Sxd6!
    • 1.Bg5+?
      • 1...Bxg5
        • 2.Qf8#
      • 1...Kxd6!
  • Keys
    • 1.Bg3!
      • threat
        • 2.Qf8#
      • 1...Qxd8
        • 2.cxd8Q#
        • 2.cxd8B#
      • 1...Sxd6
        • 2.Bxh4#
      • 1...Sxd8
        • 2.c8S#
      • 1...Rf4
        • 2.Rxd7#
      • 1...Sg6
        • 2.Qf7#
      • 1...Sf7
        • 2.Qxf7#
      • 1...Qc6
        • 2.Sxc6#
      • 1...Qe8
        • 2.c8S#
      • 1...Bf6
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • Q(g);N_GUARD::P=S
    • Q(g);N_GUARD,P_PINQ(B)::S(K),XQ(g)
    • Q(g);N_GUARD,XP(G)::S(K)
    • Q(g);N_GUARD::S(K)
    • Q(g);OGATE,XS(K)::PXQ(g)=Q
    • R(b);N_GUARD::R1(F),XQ(g)
    • R(b);N_GUARD,XB(C)::R1(F),XQ(g)
    • S(f);P_PINQ(B),SBLOCK,S_CUTQ(g),XS(K)::P=S
  • Tries
    • Try
      • B(C);
      • Threat
        • QAB1(B)
      • Vars
        • Q(g);OGATE,XS(K)::PXQ(g)=Q
        • S(f);P_PINQ(B),SBLOCK,S_CUTQ(g),XS(K)::P=S
        • R(b);N_GUARD::R1(F),XQ(g)
        • S(j);N_GUARD::QAR1(B)
        • S(j);N_GUARD::QAR1(B),XS(j)
        • Q(g);N_GUARD,P_PINQ(B)::S(K),XQ(g)
        • Q(g);N_GUARD::P=S
        • B(c);N_GUARD::QAB1(B),XB(c)
      • Refutation
        • S(f);P_PINQ(B),XR(F)
    • Try
      • B(C);
      • Threat
        • QAB1(B)
      • Vars
        • Q(g);OGATE,XS(K)::PXQ(g)=Q
        • S(f);P_PINQ(B),SBLOCK,S_CUTQ(g),XS(K)::P=S
        • S(j);N_GUARD::QAR1(B)
        • S(j);N_GUARD::QAR1(B),XS(j)
        • Q(g);N_GUARD,P_PINQ(B)::S(K),XQ(g)
        • Q(g);N_GUARD::P=S
        • R(b);N_GUARD::R1(F),XQ(g)
        • B(c);N_GUARD::QAB1(B),XB(c)
      • Refutation
        • S(f);P_PINQ(B),XR(F)
    • Try
      • B(C);CHECK
      • Vars
        • B(c);XB(C)::QAB1(B)
      • Refutation
        • K(h);S_FLIGHT,XR(F)
  • Actual
    • B(C);
    • Threat
      • QAB1(B)
    • Vars
      • Q(g);OGATE,XS(K)::PXQ(g)=Q
      • S(f);P_PINQ(B),SBLOCK,XR(F)::B(C),XB(c)
      • S(f);P_PINQ(B),SBLOCK,S_CUTQ(g),XS(K)::P=S
      • R(b);N_GUARD::R1(F),XQ(g)
      • S(j);N_GUARD::QAR1(B)
      • S(j);N_GUARD::QAR1(B),XS(j)
      • Q(g);N_GUARD,P_PINQ(B)::S(K),XQ(g)
      • Q(g);N_GUARD::P=S
      • B(c);N_GUARD::QAB1(B),XB(c)
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