MESON Chess Problem Database

Problem Display
PID: 250478 (2bRK3/p2n4/1p1k4/1P1NpP2/1p3Rp1/B1PNb1q1/B7/2Q5 w - - 0 1)

Kirillov, Valery Afanasievich

Maslov, Boris Grigorevich

Uralski Problemist, 2009

2bRK3/p2n4/1p1k4/1P1NpP2/1p3Rp1/B1PNb1q1/B7/2Q5

#2

11 + 10

4393 Uralski Problemist 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Bxc1
      • 2.Bxb4#
    • 1...Bd2
      • 2.Bxb4#
    • 1...Bxf4
      • 2.Bxb4#
    • 1...Ba6
      • 2.Rxd7#
    • 1...Bb7
      • 2.Rxd7#
  • Tries
    • 1.Rc4?
      • threat
        • 2.Rc6#
      • 1...Kxd5
        • 2.Rd4#
      • 1...Bb7
        • 2.Rxd7#
      • 1...Bc5!
    • 1.Rd4?
      • threat
        • 2.Bxb4#
      • 1...Bxd4
        • 2.Qh6#
      • 1...bxa3
        • 2.Qxa3#
      • 1...a5!
  • Keys
    • 1.Rxb4!
      • threat
        • 2.Rd4#
      • 1...Bxc1
        • 2.Rb2#
      • 1...Bd4
        • 2.Rxd4#
        • 2.Qh6#
      • 1...Bc5
        • 2.Qh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • B(a);N_GUARD,XQ(A)::B(C),XP(c)
    • B(a);N_GUARD::B(C),XP(c)
    • B(a);N_GUARD,XR(F)::B(C),XP(c)
    • B(j);N_GUARD::R1(J),XS(i)
  • Tries
    • Try
      • R(F);
      • Threat
        • R1(F)
      • Vars
        • K(g);N_SPINP(c),OGATEB,P-FLIGHT,XS(H)::B(B)+R(F),DCHECK
        • B(j);N_GUARD::R1(J),XS(i)
      • Refutation
        • B(a);N_SPINP(c)
    • Try
      • R(F);
      • Threat
        • B(C),XP(c)
      • Vars
        • B(a);OGATE,XR(F)::QAR(A)
        • P(c);N_SPINP(c),OGATE,XB(C)::QAB(A),XP(c)
      • Refutation
        • P(h);
  • Actual
    • R(F);XP(c)
    • Threat
      • B(C)+R(F)
    • Vars
      • B(a);N_GUARD,XQ(A)::B(C)+R(F)
      • B(a);OGATE::QAR(A)
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