MESON Chess Problem Database

Problem Display
PID: 240318 (6b1/1qRp3P/2pP1N1n/5B2/QPk1P3/1rP1p2r/1PP4p/3Nn2K w - - 0 1)

Maleika, Gerhard

Problem-Forum, 2004

6b1/1qRp3P/2pP1N1n/5B2/QPk1P3/1rP1p2r/1PP4p/3Nn2K

#2

13 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qa6
      • 2.Qxa6#
    • 1...Qb5
      • 2.Qxb3#
    • 1...Qxc7
      • 2.Qa6#
    • 1...Rh4
      • 2.Sxe3#
    • 1...Rh5
      • 2.Sxe3#
    • 1...Sd3
      • 2.cxb3#
    • 1...Sf3
      • 2.Sxe3#
    • 1...Sg4
      • 2.hxg8Q#
      • 2.hxg8B#
    • 1...Sxf5
      • 2.hxg8Q#
      • 2.hxg8B#
    • 1...c5
      • 2.Rxc5#
  • Tries
    • 1.b5+?
      • 1...Rb4
        • 2.Qxb4#
      • 1...Kc5!
    • 1.hxg8Q+?
      • 1...Sf7
        • 2.Qxf7#
      • 1...Sxg8!
    • 1.hxg8B+?
      • 1...Sf7
        • 2.Bxf7#
      • 1...Sxg8!
  • Keys
    • 1.Sxd7!
      • threat
        • 2.Se5#
      • 1...Qxb4
        • 2.Rxc6#
      • 1...Rxc3
        • 2.b5#
      • 1...Rxb4
        • 2.b3#
      • 1...Qb5
        • 2.Qxb3#
      • 1...Sd3
        • 2.cxb3#
      • 1...Sf3
        • 2.Sxe3#
      • 1...Sg4
        • 2.hxg8Q#
        • 2.hxg8B#
      • 1...Sf7
        • 2.Be6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • Q(i);N_GUARD::QAB(F),XQ(i)
    • Q(i);SBLOCK::QAB1(F),XR(c)
    • Q(i);N_GUARD,N_SPINP(g),XR(L)::QAB(F)
    • R(e);N_GUARD::S(A),XP(d)
    • S(a);SBLOCK::P(D),XR(c)
    • S(a);S_CUTR(e)::S(A),XP(d)
    • S(h);N_GUARD::PXB(k)=Q
    • S(h);N_GUARD,XB(I)::PXB(k)=Q
    • P(g);OGATE,P_PINP(H)::R1(L),XP(g)
  • Tries
    • Try
      • P(G);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAR1(F),XR(c)
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • P(M);CHECK,XB(k)
      • Vars
        • S(h);N_GUARD,P_SPINS(h)::QAB(M),XS(h)
      • Refutation
        • S(h);XQ(M)
    • Try
      • P(M);CHECK,XB(k)
      • Vars
        • S(h);N_GUARD,P_SPINS(h)::B(M),XS(h)
      • Refutation
        • S(h);XB(M)
  • Actual
    • S(K);XP(j)
    • Threat
      • S(K)
    • Vars
      • Q(i);N_GUARD,P_SPINQ(i),XP(G)::R(L),XP(g)
      • R(c);N_GUARD,XP(E)::QAR(F)+P(G)
      • R(c);OGATE,P_SPINR(c),XP(G)::P(C)
      • Q(i);SBLOCK::QAB1(F),XR(c)
      • S(a);SBLOCK::P(D),XR(c)
      • S(a);S_CUTR(e)::S(A),XP(d)
      • S(h);N_GUARD::PXB(k)=Q
      • S(h);S_CUTB(k)::B(I)
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