MESON Chess Problem Database

Problem Display
PID: 224261 (1n1R4/Bp1n4/pr2p1Qp/Pp1k3P/1P1NR3/N4b2/2P3p1/1B4K1 w - - 0 1)

Cortazzi, E

La Strategie, 1887

1n1R4/Bp1n4/pr2p1Qp/Pp1k3P/1P1NR3/N4b2/2P3p1/1B4K1

#2

12 + 11

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.Ba2#
    • 1...Sc6
      • 2.Rxd7#
      • 2.Qxe6#
    • 1...e5
      • 2.Ba2#
  • Tries
    • 1.Bxb6?
      • threat
        • 2.Qxe6#
      • 1...Kd6
        • 2.Qxe6#
      • 1...e5
        • 2.Ba2#
      • 1...Bg4!
    • 1.Rxd7+?
      • 1...Rd6
        • 2.Ba2#
        • 2.Qxe6#
      • 1...Sxd7!
    • 1.Qf5+?
      • 1...Kd6
        • 2.Qc5#
      • 1...e5
        • 2.Qxe5#
      • 1...exf5!
    • 1.Qg5+?
      • 1...Kxe4
        • 2.c3#
      • 1...Kd6
        • 2.Bxb8#
        • 2.Qc5#
      • 1...e5
        • 2.Qxe5#
      • 1...hxg5!
  • Keys
    • 1.Rxe6!
      • 1...Kxd4
        • 2.Qd3#
      • 1...Rxe6
        • 2.Qxe6#
      • 1...Bxh5
        • 2.Qe4#
      • 1...Rc6
        • 2.Qf5#
      • 1...Rd6
        • 2.Ba2#
      • 1...Bd1
        • 2.Qe4#
      • 1...Be2
        • 2.Qe4#
      • 1...Be4
        • 2.Qxe4#
      • 1...Bg4
        • 2.Qe4#
      • 1...Sc6
        • 2.Rxd7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 1
  • Sets
    • R(f);N_SPINS(j),SBLOCK::B(A)
    • P(g);::B(A)
  • Tries
    • Try
      • B(K);XR(f)
      • Threat
        • QAB1(J),XP(g)
      • Vars
        • K(d);P-FLIGHT,P_SPINP(g)::QAR1(J),XP(g)
        • P(g);::B(A)
      • Refutation
        • B(b);
    • Try
      • R(L);CHECK,XS(j)
      • Refutation
        • S(k);XR(L)
    • Try
      • Q(J);CHECK
      • Vars
        • K(d);OGATE,P-FLIGHT::QAB1(J)
        • P(g);P_SPINP(g)::QAR1(J),XP(g)
      • Refutation
        • P(g);XQ(J)
    • Try
      • Q(J);CHECK
      • Vars
        • K(d);N_SPINS(j),S_FLIGHT,XR(G)::B(A)+P(C)
        • P(g);P_SPINP(g)::QAR1(J),XP(g)
      • Refutation
        • P(h);XQ(J)
  • Actual
    • R(G);XP(g)
    • Vars
      • K(d);OGATEB,P-FLIGHT,P_SPINR(f),XS(F)::QAR1(J)
      • R(f);OGATE,XR(G)::QAB1(J),XR(f)
      • B(b);N_GUARD,XP(I)::QAB1(J)
      • R(f);::QAR2(J)
      • R(f);N_SPINS(j)::B(A)
      • B(b);N_GUARD::QAB1(J)
      • B(b);N_GUARD::QAB1(J),XB(b)
      • S(k);N_GUARD,S_CUTR(f)::R(L),XS(j)
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