MESON Chess Problem Database

Problem Display
PID: 232856 (1b4K1/3p4/3R1Q2/2p4p/Ppk3p1/rpN4q/2P5/2N5 w - - 0 1)

Morra, Juan Carlos

Il Due Mosse, 1954

1b4K1/3p4/3R1Q2/2p4p/Ppk3p1/rpN4q/2P5/2N5

#2

7 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc3
      • 2.Qf7#
    • 1...Qd3
      • 2.cxd3#
    • 1...Ra1
      • 2.cxb3#
    • 1...Ra2
      • 2.cxb3#
    • 1...Rxa4
      • 2.cxb3#
    • 1...bxc3
      • 2.Qf4#
  • Tries
    • 1.Sxb3?
      • threat
        • 2.Sd2#
        • 2.Sa5#
      • 1...Qxc3
        • 2.Sa5#
        • 2.Qf7#
      • 1...Rxa4
        • 2.Sd2#
      • 1...bxc3
        • 2.Qf4#
      • 1...Qg2
        • 2.Sa5#
      • 1...Qh2
        • 2.Sa5#
      • 1...Qd3
        • 2.Sa5#
      • 1...Qe3
        • 2.Sa5#
      • 1...Bc7
        • 2.Sd2#
      • 1...Rxb3!
    • 1.Sd5?
      • threat
        • 2.Sb6#
        • 2.Qf4#
      • 1...Bxd6
        • 2.Sb6#
      • 1...Qf1
        • 2.Se3#
        • 2.Sb6#
      • 1...Qg2
        • 2.Se3#
        • 2.Sb6#
      • 1...Qh1
        • 2.Se3#
        • 2.Sb6#
      • 1...Qh2
        • 2.Se3#
        • 2.Sb6#
      • 1...Qc3
        • 2.Sb6#
      • 1...Qd3
        • 2.Sb6#
        • 2.cxd3#
      • 1...Qe3
        • 2.Sxe3#
        • 2.Sb6#
      • 1...Qf3
        • 2.Sb6#
      • 1...Qg3
        • 2.Sb6#
      • 1...Ba7
        • 2.Qf4#
      • 1...Bc7
        • 2.Qf4#
      • 1...Rxa4!
  • Keys
    • 1.Rd3!
      • threat
        • 2.Qa6#
      • 1...Qxd3
        • 2.cxd3#
      • 1...Rxa4
        • 2.cxb3#
      • 1...bxc3
        • 2.Qxc3#
      • 1...Bd6
        • 2.Qf7#
      • 1...d6
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(c);SBLOCK,XS(C)::QAB(F)
    • Q(c);OGATE::P(B),XQ(c)
    • R(a);N_GUARD::P(B),XP(b)
    • R(a);N_GUARD,XP(D)::P(B),XP(b)
    • P(d);SBLOCK,XS(C)::QAR(F)
  • Tries
    • Try
      • S(A);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);XP(D)::S(A)
        • P(d);SBLOCK,XS(C)::QAR(F)
        • Q(c);::S(A)
        • B(j);::S(A)
      • Refutation
        • R(a);XS(A)
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • B(j);XR(E)::S(C)
        • Q(c);::S(C)
        • B(j);::QAR(F)
      • Refutation
        • R(a);XP(D)
  • Actual
    • R(E);
    • Threat
      • QAB(F)
    • Vars
      • Q(c);OGATE,XR(E)::P(B),XQ(c)
      • R(a);N_GUARD,XP(D)::P(B),XP(b)
      • P(d);OGATE,XS(C)::QAR1(F),XP(d)
      • B(j);S_CUTP(i)::QAB(F)
      • P(i);S_CUTB(j)::QAR(F)
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