MESON Chess Problem Database

Problem Display
PID: 83669 (3n4/1p1r1P2/5RK1/R1pBk3/1p2p3/2P1Bb2/3rQ3/2b5 w - - 0 1)

Ellerman, Arnoldo

1st Prize, Skakbladet, 1959

3n4/1p1r1P2/5RK1/R1pBk3/1p2p3/2P1Bb2/3rQ3/2b5

#2

8 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5
      • 2.Rxc5#
    • 1...R2xd5
      • 2.Qh2#
    • 1...R7xd5
      • 2.Bf4#
    • 1...Bh1
      • 2.Qh5#
    • 1...Bg2
      • 2.Qh5#
    • 1...Bh5+
      • 2.Qxh5#
    • 1...c4
      • 2.Bf4#
  • Tries
    • 1.Rxc5?
      • threat
        • 2.Bf4#
      • 1...Bh5+
        • 2.Qxh5#
      • 1...Rxe2
        • 2.Bd4#
      • 1...R2xd5
        • 2.Bd4#
        • 2.Qh2#
      • 1...Se6
        • 2.Rxe6#
      • 1...Rd1
        • 2.Qh2#
      • 1...Ra2
        • 2.Bd4#
      • 1...Rb2
        • 2.Bd4#
      • 1...Rc2
        • 2.Bd4#
      • 1...Rd3
        • 2.Qh2#
      • 1...Rd4
        • 2.Bxd4#
        • 2.Qh2#
        • 2.cxd4#
      • 1...bxc3!
    • 1.Qh2+?
      • 1...Kxd5
        • 2.Rxc5#
      • 1...Rxh2!
  • Keys
    • 1.Bxc5!
      • threat
        • 2.Rf5#
      • 1...Bh5+
        • 2.Qxh5#
      • 1...Kxd5
        • 2.Bb6#
      • 1...R2xd5
        • 2.Bd4#
      • 1...R7xd5
        • 2.Bd6#
      • 1...Rxf7
        • 2.Bd6#
      • 1...Rd6
        • 2.Bxd6#
      • 1...Bg4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • K(g);OGATEB,P-FLIGHT,P_SPINP(f),XB(E)::R1(D),XP(f)
    • R(b);N_GUARD,SBLOCK,XB(E)::QAB(A)
    • R(i);SBLOCK,XB(E)::B(C)
    • B(c);OGATE::QAR(A)
    • B(c);CHECK,OGATE::QAR(A),XB(c)
    • P(f);::B(C)
  • Tries
    • Try
      • R(D);XP(f)
      • Threat
        • B(C)
      • Vars
        • B(c);CHECK,OGATE::QAR(A),XB(c)
        • R(b);N_GUARD,XQ(A)::B(C)
        • S(j);N_GUARD::R1(F),XS(j)
        • R(b);N_GUARD::QAB(A)
        • R(b);N_GUARD::B(C)
      • Refutation
        • P(d);XP(B)
    • Try
      • Q(A);CHECK
      • Vars
        • K(g);P-FLIGHT,P_SPINP(f),XB(E)::R1(D),XP(f)
      • Refutation
        • R(b);XQ(A)
  • Actual
    • B(C);P_PINP(e),XP(f)
    • Threat
      • R1(F)
    • Vars
      • B(c);CHECK,OGATE::QAR(A),XB(c)
      • K(g);N_SPINP(e),OGATEB,P-FLIGHT,XB(E)::R(D)+B(C)
      • R(b);N_GUARD,XB(E)::B(C)
      • R(i);N_GUARD,XB(E)::B(C)
      • R(i);N_GUARD,XP(H)::B(C)
      • R(i);N_GUARD,P_PINR(F)::B(C),XR(i)
      • B(c);N_GUARD::QAR1(A),XP(e)
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