MESON Chess Problem Database

Problem Display
PID: 109675 (8/NB1bp2K/1P1kP2Q/3p2p1/1P6/B3R3/2r5/2R1b3 w - - 0 1)

Wallis, Walter Warren

Sinfonie Scacchistiche, 1970

8/NB1bp2K/1P1kP2Q/3p2p1/1P6/B3R3/2r5/2R1b3

#2

10 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rd2
      • 2.b5#
    • 1...Rc5
      • 2.bxc5#
    • 1...Rc6
      • 2.Sb5#
    • 1...Bd2
      • 2.Qh2#
    • 1...Bb5
      • 2.Sxb5#
    • 1...Bc6
      • 2.Sc8#
    • 1...Bxe6
      • 2.Qxe6#
    • 1...Bc8
      • 2.Sb5#
    • 1...g4
      • 2.Qf4#
  • Tries
    • 1.Qh2+?
      • 1...Bg3
        • 2.Qxg3#
      • 1...Rxh2+!
    • 1.b5+?
      • 1...Rc5
        • 2.Bxc5#
      • 1...Bb4!
    • 1.exd7+?
      • 1...e6
        • 2.Qxe6#
        • 2.d8Q#
      • 1...Kxd7!
  • Keys
    • 1.Rd1!
      • threat
        • 2.Rxd5#
      • 1...Rd2
        • 2.b5#
      • 1...Rc5
        • 2.bxc5#
      • 1...Rc6
        • 2.Sb5#
      • 1...Bd2
        • 2.Qh2#
      • 1...Bc6
        • 2.Sc8#
      • 1...d4
        • 2.Rxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • R(b);N_GUARD,S_CUTB(a)::B(B)+P(D)
    • R(b);OGATE::P(D),XR(b)
    • R(b);S_CUTB(f)::S(H)
    • B(a);N_GUARD,S_CUTR(b)::QAB(G)
    • B(f);N_GUARD::S(H),XB(f)
    • B(f);N_GUARD,S_CUTR(b)::S(H)
    • B(f);OGATE,P_SPINB(f),XP(F)::QAR1(G),XB(f)
    • B(f);N_GUARD::S(H)
    • P(d);OGATE::QAB(G)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB(G),XB(a)
      • Refutation
        • R(b);CHECK,XQ(G)
    • Try
      • P(D);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::B(B),XR(b)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • P(F);CHECK,XB(f)
      • Refutation
        • K(e);P-FLIGHT,XP(F)
  • Actual
    • R(A);P_PINP(c)
    • Threat
      • R1(A),XP(c)
    • Vars
      • R(b);N_GUARD,N_SPINP(c),S_CUTB(a)::B(B)+P(D)
      • R(b);OGATE::P(D),XR(b)
      • R(b);S_CUTB(f)::S(H)
      • B(a);N_GUARD,N_SPINP(c),S_CUTR(b)::QAB(G)
      • B(f);N_GUARD,S_CUTR(b)::S(H)
      • P(c);OGATEB::R(A),XP(c)
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