MESON Chess Problem Database

Problem Display
PID: 139392 (1Rb5/2P4r/2p1NQP1/pq2P2p/p6R/Bk1B3K/p7/nN6 w - - 0 1)

Ellerman, Arnoldo

HM., Midweek Sports Referee, 1926

1Rb5/2P4r/2p1NQP1/pq2P2p/p6R/Bk1B3K/p7/nN6

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qb6
      • 2.Rxb6#
    • 1...Rd7
      • 2.Sc5#
    • 1...Ba6
      • 2.Sd4#
      • 2.Sc5#
    • 1...Bxe6+
      • 2.Qxe6#
    • 1...Bb7
      • 2.Sd4#
    • 1...Sc2
      • 2.Bc4#
    • 1...c5
      • 2.Rxb5#
  • Keys
    • 1.Qf3!
      • threat
        • 2.Bf5#
      • 1...axb1Q
        • 2.Bxb1#
      • 1...axb1S
        • 2.Bxb1#
      • 1...axb1B
        • 2.Bxb1#
      • 1...axb1R
        • 2.Bxb1#
      • 1...Rd7
        • 2.Sc5#
      • 1...Bb7
        • 2.Sd4#
      • 1...Sc2
        • 2.Bc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • Q(f);OGATEB::R(K),XQ(f)
    • R(i);N_PINS(G)::S(G)
    • B(j);CHECK,OGATE,XS(G)::QAB(H),XB(j)
    • B(j);N_PINS(G),N_SPINQ(f)::S(G)
    • S(a);SBLOCK::B(C)
    • P(h);N_GUARD::R(K),XQ(f)
  • Actual
    • Q(H);
    • Threat
      • QAR(H)+B(C)
    • Vars
      • P(b);OGATE,XS(A)::QAR(H)+B(C),XQ(b)
      • P(b);OGATE,XS(A)::QAR(H)+B(C),XS(b)
      • P(b);OGATE,XS(A)::QAR(H)+B(C),XB(b)
      • P(b);OGATE,XS(A)::QAR(H)+B(C),XR(b)
      • R(i);N_PINS(G)::S(G)
      • B(j);N_PINS(G),N_SPINQ(f)::S(G)
      • S(a);SBLOCK::QAR(H)+B(C),DCHECK
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