MESON Chess Problem Database

Problem Display
PID: 47572 (1n3B2/8/1p2R3/b2k1P2/N2r3p/7K/2Q5/8 w - - 0 1)

Morra, Juan Carlos

Themes-64, 1956

1n3B2/8/1p2R3/b2k1P2/N2r3p/7K/2Q5/8

#2

6 + 6

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Qe4#
    • 1...Rd2
      • 2.Qe4#
    • 1...Rd3+
      • 2.Qxd3#
    • 1...Re4
      • 2.Qxe4#
    • 1...Be1
      • 2.Sxb6#
    • 1...Bd2
      • 2.Sxb6#
    • 1...Bc3
      • 2.Sxb6#
    • 1...Bb4
      • 2.Sxb6#
    • 1...Sa6
      • 2.Qc6#
    • 1...Sc6
      • 2.Qxc6#
    • 1...Sd7
      • 2.Qc6#
    • 1...b5
      • 2.Qc5#
  • Tries
    • 1.Qe2?
      • threat
        • 2.Rd6#
        • 2.Qb5#
      • 1...Rd3+
        • 2.Qxd3#
      • 1...Rd1
        • 2.Rd6#
        • 2.Qe4#
      • 1...Rd2
        • 2.Rd6#
        • 2.Qe4#
      • 1...Rb4
        • 2.Rd6#
      • 1...Rc4
        • 2.Rd6#
        • 2.Qe5#
      • 1...Re4
        • 2.Qxe4#
      • 1...Rf4
        • 2.Rd6#
      • 1...Rg4
        • 2.Rd6#
      • 1...Bb4
        • 2.Sxb6#
      • 1...Sa6
        • 2.Rd6#
      • 1...Sd7
        • 2.Rd6#
      • 1...b5
        • 2.Rd6#
        • 2.Qxb5#
      • 1...Rxa4!
    • 1.Qg2+?
      • 1...Re4
        • 2.Qxe4#
      • 1...Kc4!
  • Keys
    • 1.Qc3!
      • 1...Rd3+
        • 2.Qxd3#
      • 1...Rxa4
        • 2.Re5#
      • 1...Bxc3
        • 2.Sxb6#
      • 1...Rc4
        • 2.Qe5#
      • 1...Rd1
        • 2.Re5#
      • 1...Rd2
        • 2.Re5#
      • 1...Rb4
        • 2.Re5#
      • 1...Re4
        • 2.Rd6#
      • 1...Rf4
        • 2.Re5#
      • 1...Rg4
        • 2.Re5#
      • 1...Bb4
        • 2.Sxb6#
      • 1...Sa6
        • 2.Qc6#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sd7
        • 2.Qc6#
      • 1...b5
        • 2.Qc5#

This anticipates 242337(1957)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • R(a);N_GUARD::QAB1(A)
    • R(a);CHECK,OGATEB::QAR2(A),XR(a)
    • R(a);N_GUARD::QAB1(A),XR(a)
    • B(c);N_GUARD::S(C),XP(e)
    • S(f);N_GUARD::QAB1(A)
    • S(f);N_GUARD::QAB1(A),XS(f)
    • P(e);N_GUARD::QAR1(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);CHECK,OGATEB::QAR2(A),XR(a)
        • R(a);::R1(E)
        • R(a);N_GUARD::QAB1(A),XR(a)
        • B(c);N_GUARD::S(C),XP(e)
        • S(f);::R1(E)
      • Refutation
        • R(a);XS(C)
    • Try
      • Q(A);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAB1(A),XR(a)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • R(a);CHECK,OGATEB::QAR2(A),XR(a)
      • R(a);XS(C)::R1(E)
      • B(c);N_GUARD,XQ(A)::S(C),XP(e)
      • R(a);OGATE,SBLOCK::QAR1(A)
      • R(a);::R1(E)
      • R(a);SBLOCK::R1(E)
      • B(c);N_GUARD::S(C),XP(e)
      • S(f);N_GUARD::QAB1(A)
      • S(f);N_GUARD::QAB1(A),XS(f)
      • P(e);N_GUARD::QAR1(A)
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