MESON Chess Problem Database

Problem Display
PID: 137643 (7B/2r1p3/n2pP2p/1r3k1K/2p2NR1/1pN2p2/b2R4/2Q5 w - - 0 1)

Ellerman, Arnoldo

Ajedrez Argentino, 1954

7B/2r1p3/n2pP2p/1r3k1K/2p2NR1/1pN2p2/b2R4/2Q5

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.Rd5#
    • 1...Rd5
      • 2.Rxd5#
    • 1...Rb6
      • 2.Rd5#
    • 1...Rbb7
      • 2.Rd5#
    • 1...Rb8
      • 2.Rd5#
    • 1...Bb1
      • 2.Qxb1#
    • 1...Sc5
      • 2.Rd5#
    • 1...b2
      • 2.Qc2#
  • Tries
    • 1.Rg5+?
      • 1...Kxf4
        • 2.Rd1#
        • 2.Rxa2#
        • 2.Rb2#
        • 2.Rc2#
        • 2.Re2#
        • 2.Rf2#
        • 2.Rg2#
        • 2.Rh2#
        • 2.Rd3#
        • 2.Rd4#
        • 2.Rdd5#
        • 2.Rxd6#
      • 1...hxg5!
    • 1.Rg8?
      • threat
        • 2.Rf8#
      • 1...Kxf4+
        • 2.Rd5#
      • 1...Rb8
        • 2.Rd5#
      • 1...Rc8!
    • 1.Qe1?
      • threat
        • 2.Qe4#
      • 1...Bb1
        • 2.Qxb1#
      • 1...Sc5
        • 2.Rd5#
      • 1...d5
        • 2.Qe5#
      • 1...Re5!
  • Keys
    • 1.Rg7!
      • threat
        • 2.Rf7#
      • 1...Kxf4+
        • 2.Rd5#
      • 1...Kf6+
        • 2.Rg5#
      • 1...Ke5
        • 2.Rf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • R(e);N_GUARD::R(B)
    • R(e);N_GUARD::R(B),XR(e)
    • B(a);N_GUARD::QAB(A),XB(a)
    • S(g);S_CUTR(e)::R(B)
    • P(b);N_GUARD::QAB(A)
  • Tries
    • Try
      • R(E);CHECK
      • Refutation
        • P(i);XR(E)
    • Try
      • R(E);
      • Threat
        • R(E)
      • Vars
        • K(f);CHECK,P-FLIGHT,XS(D)::QAB(A)+R(B)
        • R(e);N_GUARD::R(B)
      • Refutation
        • R(j);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • B(a);N_GUARD::QAB(A),XB(a)
        • S(g);S_CUTR(e)::R(B)
        • P(h);N_GUARD,S_CUTR(e)::QAR1(A)
      • Refutation
        • R(e);
  • Actual
    • R(E);
    • Threat
      • R(E)
    • Vars
      • K(f);CHECK,P-FLIGHT,XS(D)::QAB(A)+R(B)
      • K(f);CHECK,P-FLIGHT::B(H)+R(E)
      • K(f);P-FLIGHT::B(H)+R(E)
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