MESON Chess Problem Database

Problem Display
PID: 137897 (KN4B1/2p2r2/3pk3/1prN1p2/3Pb2B/4Q3/8/8 w - - 0 1)

Ellerman, Arnoldo

Folket, 1926

KN4B1/2p2r2/3pk3/1prN1p2/3Pb2B/4Q3/8/8

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5
      • 2.Bxf7#
    • 1...Rxd5
      • 2.Qh6#
    • 1...Rc6
      • 2.Sf4#
    • 1...f4
      • 2.Qxe4#
    • 1...c6
      • 2.Sf4#
      • 2.Sc7#
  • Keys
    • 1.Ka7!
      • threat
        • 2.Sf4#
      • 1...c6+
        • 2.Sc7#
      • 1...Kxd5
        • 2.Bxf7#
      • 1...Rxd5
        • 2.Qh6#
      • 1...f4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(f);N_SPINB(a),S_FLIGHT,XS(D)::B(G),XR(h)
    • R(c);SBLOCK,XS(D)::QAR(A)
    • R(c);N_PINS(D)::S(D)
    • P(d);N_GUARD::QAR2(A),XB(a)
  • Actual
    • K(E);N_SPINS(D),P-FLIGHT
    • Threat
      • S(D)
    • Vars
      • P(g);CHECK,S_CUTR(c)::S(D)
      • K(f);N_SPINB(a),S_FLIGHT,XS(D)::B(G),XR(h)
      • R(c);SBLOCK,XS(D)::QAR(A)
      • P(d);N_GUARD::QAR2(A),XB(a)
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