MESON Chess Problem Database

Problem Display
PID: 110002 (8/1N6/2K5/p1RNp3/k2q2R1/p1rP4/2P5/3Bb3 w - - 0 1)

Castellari, Umberto

Il Problema, 1932

8/1N6/2K5/p1RNp3/k2q2R1/p1rP4/2P5/3Bb3

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb4
      • 2.Sb6#
    • 1...Rxc2
      • 2.Bxc2#
    • 1...Rb3
      • 2.cxb3#
    • 1...Rxd3
      • 2.cxd3#
    • 1...Rc4
      • 2.c3#
    • 1...Rxc5+
      • 2.Sxc5#
  • Tries
    • 1.Kd7?
      • threat
        • 2.Rxa5#
      • 1...Rxc2
        • 2.Bxc2#
      • 1...Rxd3
        • 2.cxd3#
      • 1...Rxc5
        • 2.c4#
      • 1...Rb3
        • 2.cxb3#
      • 1...Rc4
        • 2.c3#
      • 1...Qxg4+!
    • 1.Rxd4+?
      • 1...Rc4
        • 2.c3#
      • 1...exd4!
    • 1.Rc4+?
      • 1...Qxc4+
        • 2.Sc5#
      • 1...Rxc4+!
  • Keys
    • 1.Kd6!
      • threat
        • 2.Rxa5#
      • 1...Rxc2
        • 2.Bxc2#
      • 1...Rxd3
        • 2.cxd3#
      • 1...Rxc5
        • 2.c4#
      • 1...Qb4
        • 2.Sb6#
      • 1...Rb3
        • 2.cxb3#
      • 1...Rc4
        • 2.c3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • Q(e);::S(F)
    • R(c);OGATE,P_SPINR(c),XP(B)::B(A),XR(c)
    • R(c);N_PINR(E),OGATE::P(B),XR(c)
    • R(c);N_PINR(E),OGATE,XP(C)::B(A)+P(B),XR(c)
    • R(c);N_SPINQ(e),OGATE::B(A)+P(B)
    • R(c);CHECK,XR(E)::S(H),XR(c)
  • Tries
    • Try
      • K(G);N_SPINR(E),P_SPINS(F),S_FLIGHT
      • Threat
        • R1(E),XP(f)
      • Vars
        • R(c);OGATE,P_SPINR(c),XP(B)::B(A),XR(c)
        • R(c);OGATE,XP(C)::B(A)+P(B),XR(c)
        • R(c);OGATE,XR(E)::B(A)+P(B)
        • R(c);OGATE::P(B),XR(c)
        • R(c);N_SPINQ(e),OGATE::B(A)+P(B)
      • Refutation
        • Q(e);CHECK,N_PINS(F),N_SPINQ(e),XR(D)
    • Try
      • R(D);CHECK,XQ(e)
      • Vars
        • R(c);OGATE,P_SPINR(c)::B(A)+P(B)
      • Refutation
        • P(g);XR(D)
    • Try
      • R(E);CHECK,N_PINQ(e)
      • Vars
        • Q(e);CHECK,P_SPINQ(e),XR(E)::S(H)
      • Refutation
        • R(c);CHECK,XR(E)
  • Actual
    • K(G);N_SPINR(E),P-FLIGHT,P_SPINS(F)
    • Threat
      • R1(E),XP(f)
    • Vars
      • R(c);OGATE,P_SPINR(c),XP(B)::B(A),XR(c)
      • R(c);OGATE,XP(C)::B(A)+P(B),XR(c)
      • R(c);OGATE,XR(E)::B(A)+P(B)
      • Q(e);N_PINS(F),P_PINR(E)::S(F)
      • R(c);OGATE::P(B),XR(c)
      • R(c);N_SPINQ(e),OGATE::B(A)+P(B)
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