MESON Chess Problem Database

Problem Display
PID: 152292 (nN1RK3/6Qp/2P1pR1r/4k3/2P1bp1B/3pP3/2PNpq2/b5rn w - - 0 1)

Ellerman, Arnoldo

Good Companions (October), 1915

nN1RK3/6Qp/2P1pR1r/4k3/2P1bp1B/3pP3/2PNpq2/b5rn

#2

11 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.exf4#
    • 1...Qg2
      • 2.exf4#
    • 1...Rxf6
      • 2.Qxf6#
    • 1...Bg2
      • 2.Qg5#
    • 1...Bf3
      • 2.exf4#
    • 1...Bf5
      • 2.Rg6#
    • 1...Bxc6+
      • 2.Sxc6#
    • 1...Bg6+
      • 2.Rf7#
    • 1...Sb6
      • 2.Qc7#
    • 1...Sc7+
      • 2.Qxc7#
  • Tries
    • 1.Rxf4+?
      • 1...Rf6
        • 2.Bxf6#
        • 2.Qxf6#
      • 1...Rxg7!
    • 1.Rf7+?
      • 1...Rf6
        • 2.Qxf6#
      • 1...Rxg7!
    • 1.Rf8+?
      • 1...Rf6
        • 2.Qxf6#
      • 1...Rxg7!
    • 1.Rd5+?
      • 1...exd5
        • 2.Sd7#
        • 2.Qe7#
      • 1...Bxd5!
  • Keys
    • 1.c5!
      • threat
        • 2.Sc4#
      • 1...Bxc6+
        • 2.Sxc6#
      • 1...Bg6+
        • 2.Rf7#
      • 1...Sc7+
        • 2.Qxc7#
      • 1...Rxf6
        • 2.Qxf6#
      • 1...Bg2
        • 2.Qg5#
      • 1...Bf3
        • 2.exf4#
      • 1...Bd5
        • 2.Sd7#
      • 1...Bf5
        • 2.Rg6#
      • 1...Sb6
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • Q(e);N_GUARD::P(C),XP(h)
    • R(k);OGATE,P_SPINR(k),XR(G)::QAB1(H),XR(k)
    • B(g);N_GUARD,S_CUTR(b)::QAR2(H)
    • B(g);S_CUTQ(e)::P(C),XP(h)
    • B(g);SBLOCK::QAB(H)+R(G)
    • B(g);CHECK,XP(F)::S(I),XB(g)
    • B(g);CHECK,S_CUTR(b),S_CUTR(k)::QAB(H)+R(G)
    • S(m);N_GUARD::QAB(H)
    • S(m);CHECK,N_GUARD::QAB(H),XS(m)
  • Tries
    • Try
      • R(G);CHECK,XP(h)
      • Refutation
        • R(b);XQ(H)
    • Try
      • R(G);CHECK
      • Vars
        • R(k);N_GUARD,P_SPINR(k)::QAB1(H),XR(k)
      • Refutation
        • R(b);XQ(H)
    • Try
      • R(G);CHECK
      • Vars
        • R(k);N_GUARD,P_SPINR(k)::QAB1(H),XR(k)
      • Refutation
        • R(b);XQ(H)
    • Try
      • R(J);CHECK
      • Refutation
        • B(g);XR(J)
  • Actual
    • P(D);
    • Threat
      • S(B)
    • Vars
      • B(g);CHECK,XP(F)::S(I),XB(g)
      • B(g);CHECK,S_CUTR(b),S_CUTR(k)::QAB(H)+R(G)
      • S(m);CHECK,N_GUARD::QAB(H),XS(m)
      • R(k);OGATE,P_SPINR(k),XR(G)::QAB1(H),XR(k)
      • B(g);N_GUARD,S_CUTR(b)::QAR2(H)
      • B(g);S_CUTQ(e)::P(C),XP(h)
      • B(g);SBLOCK::S(I)
      • B(g);SBLOCK::QAB(H)+R(G)
      • S(m);N_GUARD::QAB(H)
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