MESON Chess Problem Database

Problem Display
PID: 234236 (8/8/r1nP4/1b4b1/2k2p2/1rB4K/Bn2P1p1/1NRRN1Q1 w - - 0 1)

Ellerman, Arnoldo

Chess World (The), 1946

8/8/r1nP4/1b4b1/2k2p2/1rB4K/Bn2P1p1/1NRRN1Q1

#2

10 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Sxa3#
    • 1...Rb6
      • 2.Sa3#
    • 1...Ba4
      • 2.Sa3#
    • 1...Sa4
      • 2.Sa3#
    • 1...Sb4
      • 2.Qd4#
    • 1...Sd4
      • 2.Qxd4#
    • 1...Sa5
      • 2.Sa3#
      • 2.Qd4#
    • 1...Se5
      • 2.Qd4#
    • 1...Sa7
      • 2.Qd4#
    • 1...Se7
      • 2.Qd4#
    • 1...Sb8
      • 2.Qd4#
    • 1...Sd8
      • 2.Qd4#
  • Tries
    • 1.Rd3?
      • threat
        • 2.Sd2#
        • 2.Bd2#
        • 2.Ba5#
      • 1...Rxa2
        • 2.Sd2#
      • 1...Ba4
        • 2.Sa3#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Ra5
        • 2.Sd2#
        • 2.Bd2#
        • 2.Bxa5#
      • 1...Bf6
        • 2.Sd2#
      • 1...Sd1
        • 2.Sd2#
      • 1...Sa4
        • 2.Sd2#
        • 2.Sa3#
      • 1...Sb4
        • 2.Sd2#
        • 2.Qd4#
      • 1...Sa5
        • 2.Sd2#
        • 2.Sa3#
        • 2.Bd2#
        • 2.Bxa5#
        • 2.Qd4#
      • 1...f3
        • 2.Bd2#
      • 1...Sxd3!
    • 1.Rd4+?
      • 1...Sxd4
        • 2.Qxd4#
      • 1...Kc5!
  • Keys
    • 1.e4!
      • threat
        • 2.Sd2#
      • 1...fxe4 ep
        • 2.Ba5#
      • 1...Ba4
        • 2.Sa3#
      • 1...Sd4
        • 2.Qxd4#
      • 1...f3
        • 2.Bd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • R(h);N_GUARD::S(A),XR(h)
    • R(h);N_GUARD::S(A)
    • B(f);S_CUTR(h)::S(A)
    • S(a);S_CUTR(h)::S(A)
    • S(i);N_GUARD::QAR1(E)
    • S(i);N_GUARD::QAR1(E),XS(i)
  • Tries
    • Try
      • R(C);N_SPINB(H)
      • Threat
        • DUALS(3)
      • Vars
        • R(h);N_SPINR(c),XB(F)::S(A)
        • B(f);S_CUTR(h)::S(A)
        • S(i);N_GUARD::QAR1(E),XS(i)
        • B(g);::S(A)
        • S(a);::S(A)
        • P(e);::R(B)+B(H)
      • Refutation
        • S(a);XR(C)
    • Try
      • R(C);CHECK
      • Vars
        • S(i);OGATE,XR(C)::QAR1(E),XS(i)
      • Refutation
        • K(d);N_SPINR(c),P-FLIGHT
  • Actual
    • P(G);
    • Threat
      • S(A)
    • Vars
      • P(e);EP,N_PINB(H),XP(G)::R(B)+B(H)
      • B(f);S_CUTR(h)::S(A)
      • S(i);N_GUARD::QAR1(E),XS(i)
      • P(e);N_PINB(H)::R(B)+B(H)
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