MESON Chess Problem Database

Problem Display
PID: 137772 (K6n/p4BQN/3p4/5k1p/2N1n2b/qp2R3/4prR1/8 w - - 0 1)

Ellerman, Arnoldo

Magyar Sakkvilag, 1936

K6n/p4BQN/3p4/5k1p/2N1n2b/qp2R3/4prR1/8

#2

7 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg2
      • 2.Rf3#
    • 1...Rf3
      • 2.Rxf3#
    • 1...Sg3
      • 2.Rxf2#
    • 1...Sg5
      • 2.Qf6#
    • 1...d5
      • 2.Qe5#
  • Tries
    • 1.Rxf2+?
      • 1...Bxf2
        • 2.Rf3#
      • 1...Sxf2!
    • 1.Qg6+?
      • 1...Kf4
        • 2.Qxe4#
      • 1...Sxg6!
  • Keys
    • 1.Qd4!
      • threat
        • 2.Qxe4#
      • 1...Kf4
        • 2.Qxe4#
      • 1...Rf4
        • 2.Qd5#
      • 1...Sd2
        • 2.Be6#
      • 1...Sc3
        • 2.Be6#
      • 1...Sg3
        • 2.Rxf2#
      • 1...Sc5
        • 2.Sxd6#
      • 1...Sg5
        • 2.Qf6#
      • 1...Sf6
        • 2.Be6#
      • 1...d5
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • R(b);N_GUARD,XR(A)::R(B)
    • R(b);N_GUARD::R(B),XR(b)
    • S(e);N_GUARD,S_CUTB(f)::R(A),XR(b)
    • S(e);N_GUARD,S_CUTB(f)::QAR1(E)
    • P(i);N_GUARD::QAR1(E)
  • Tries
    • Try
      • R(A);CHECK,XR(b)
      • Vars
        • B(f);XR(A)::R(B)
      • Refutation
        • S(e);XR(A)
    • Try
      • Q(E);CHECK
      • Vars
        • K(g);OGATE,P-FLIGHT::QAR1(E),XS(e)
      • Refutation
        • S(k);XQ(E)
  • Actual
    • Q(E);
    • Threat
      • QAB1(E),XS(e)
    • Vars
      • K(g);P-FLIGHT,P_SPINS(e)::QAR1(E),XS(e)
      • R(b);SBLOCK::QAR2(E)
      • S(e);::B(D)
      • S(e);N_GUARD,S_CUTB(f)::R(A),XR(b)
      • S(e);N_GUARD,S_CUTQ(c)::S(C),XP(i)
      • S(e);N_GUARD,S_CUTB(f)::QAR1(E)
      • P(i);N_GUARD::QAR1(E)
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