MESON Chess Problem Database

Problem Display
PID: 237736 (5r2/5p1p/3N1Q2/1P1kP1NR/1P2p2K/6p1/3rp3/Bbn4B w - - 0 1)

Ellerman, Arnoldo

Arbejder-Skak, 1949

5r2/5p1p/3N1Q2/1P1kP1NR/1P2p2K/6p1/3rp3/Bbn4B

#2

10 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rc2
      • 2.Bxe4#
    • 1...Rd3
      • 2.Bxe4#
    • 1...Ra8
      • 2.Qxf7#
    • 1...Rb8
      • 2.Qxf7#
    • 1...Rc8
      • 2.Qxf7#
    • 1...Rd8
      • 2.Qxf7#
    • 1...Rg8
      • 2.Qxf7#
    • 1...Rh8
      • 2.Qxf7#
    • 1...Ba2
      • 2.Bxe4#
    • 1...Sd3
      • 2.Bxe4#
  • Tries
    • 1.Sh3?
      • threat
        • 2.Sf4#
      • 1...Sd3
        • 2.Bxe4#
      • 1...Rb2!
    • 1.Sgxf7?
      • threat
        • 2.e6#
      • 1...Rxf7
        • 2.Qxf7#
      • 1...Sd3
        • 2.Bxe4#
      • 1...Rg8!
    • 1.e6?
      • threat
        • 2.Sgxe4#
        • 2.Sgxf7#
        • 2.Qe5#
      • 1...fxe6
        • 2.Qe5#
        • 2.Qxe6#
      • 1...Rb2
        • 2.Sgxe4#
        • 2.Sgxf7#
      • 1...Rd4
        • 2.Sgxe4#
        • 2.Sgxf7#
        • 2.Qxd4#
      • 1...Rg8
        • 2.Qe5#
      • 1...Sd3
        • 2.Qd4#
      • 1...Kxd6!
  • Keys
    • 1.Sgxe4!
      • threat
        • 2.e6#
      • 1...Bxe4
        • 2.Bxe4#
      • 1...Rg8
        • 2.Qxf7#
      • 1...Sd3
        • 2.Sxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • R(c);S_CUTB(a)::B(B),XP(f)
    • R(j);N_GUARD::QAB(J),XP(h)
    • B(a);N_GUARD::B(B),XP(f)
    • S(b);S_CUTB(a)::B(B),XP(f)
  • Tries
    • Try
      • S(G);
      • Threat
        • S(G)
      • Vars
        • S(b);S_CUTB(a)::B(B),XP(f)
      • Refutation
        • R(c);
    • Try
      • S(G);XP(h)
      • Threat
        • R(H)+P(F)
      • Vars
        • R(j);OGATE,XS(G)::QAB(J),XR(j)
        • S(b);S_CUTB(a)::B(B),XP(f)
      • Refutation
        • R(j);
    • Try
      • P(F);
      • Threat
        • DUALS(3)
      • Vars
        • R(j);::QAR1(J)
        • S(b);S_CUTR(c)::QAR1(J)
      • Refutation
        • K(g);N_SPINP(f),P-FLIGHT,XS(I)
  • Actual
    • S(G);XP(f)
    • Threat
      • R(H)+P(F)
    • Vars
      • B(a);OGATE,P_SPINB(a),XS(G)::B(B),XB(a)
      • R(j);N_GUARD::QAB(J),XP(h)
      • S(b);S_CUTB(a)::B(B)+S(G),XP(e)
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