MESON Chess Problem Database

Problem Display
PID: 96316 (1b6/n1p5/npR3Q1/rk1N3R/rNp5/p7/P6K/8 w - - 0 1)

Camorani, Mario

The Chess Problem, 1946

1b6/n1p5/npR3Q1/rk1N3R/rNp5/p7/P6K/8

#2

7 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb4
      • 2.Sc3#
    • 1...Sxb4
      • 2.Sxc7#
    • 1...Sxc6
      • 2.Qxc6#
    • 1...c3
      • 2.Qd3#
  • Tries
    • 1.Sc2?
      • threat
        • 2.Sd4#
        • 2.Sc3#
        • 2.Sxc7#
      • 1...Sxc6
        • 2.Sc3#
        • 2.Sxc7#
      • 1...Rb4
        • 2.Sc3#
      • 1...Sb4
        • 2.Sdxb4#
        • 2.Sxc7#
      • 1...c3
        • 2.Sxc3#
        • 2.Sxc7#
      • 1...Sc5!
    • 1.Se3+?
      • 1...Kxb4
        • 2.Rxc4#
      • 1...Sc5!
    • 1.Sxb6+?
      • 1...Kxb4
        • 2.Rxc4#
      • 1...Sc5!
    • 1.Rxb6+?
      • 1...Kc5
        • 2.Qg1#
      • 1...cxb6+!
    • 1.Rxc7?
      • threat
        • 2.Qxb6#
      • 1...Rxb4
        • 2.Sc3#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sc8
        • 2.Qe8#
        • 2.Qc6#
      • 1...Bxc7+!
    • 1.Qb1?
      • threat
        • 2.Sc3#
        • 2.Sxc7#
      • 1...Sxb4
        • 2.Sxb4#
      • 1...Sc5
        • 2.Sc3#
      • 1...c3
        • 2.Sxc3#
        • 2.Sxc7#
        • 2.Qd3#
        • 2.Qf1#
      • 1...Rxb4!
  • Keys
    • 1.Qe8!
      • 1...Rxb4
        • 2.Sc3#
      • 1...Sxb4
        • 2.Sxc7#
      • 1...Sxc6
        • 2.Qxc6#
      • 1...Sc5
        • 2.Rxb6#
      • 1...Sc8
        • 2.Rxc7#
      • 1...c3
        • 2.Qe2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(b);SBLOCK,XS(C)::R(E)+S(D),DCHECK
    • S(f);SBLOCK,XS(C)::R(E)+S(D),DCHECK,XP(i)
    • S(h);OGATE,XR(F)::QAB1(G),XS(h)
    • P(c);OGATEB::QAB(G)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(3)
      • Vars
        • R(b);::R(E)+S(D),DCHECK
      • Refutation
        • S(f);
    • Try
      • S(D);CHECK
      • Vars
        • K(e);P-FLIGHT,XS(C)::R1(F),XP(c)
      • Refutation
        • S(f);P_SPINS(f)
    • Try
      • S(D);CHECK,XP(g)
      • Vars
        • K(e);P-FLIGHT,XS(C)::R1(F),XP(c)
      • Refutation
        • S(f);P_SPINS(f)
    • Try
      • R(F);CHECK,XP(g)
      • Vars
        • K(e);P-FLIGHT::QAB(G)
      • Refutation
        • P(i);CHECK,XR(F)
    • Try
      • R(F);P_SPINR(F),XP(i)
      • Threat
        • QAR1(G),XP(g)
      • Vars
        • R(b);SBLOCK,XS(C)::R(E)+S(D),DCHECK
        • S(h);N_GUARD::QAB1(G),XS(h)
      • Refutation
        • B(j);CHECK,XR(F)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • S(f);P_SPINS(f),XS(C)::R(E)+S(D),XS(f)
        • S(f);::S(D)
      • Refutation
        • R(b);P_SPINR(b),XS(C)
  • Actual
    • Q(G);
    • Vars
      • R(b);SBLOCK,XS(C)::R(E)+S(D),DCHECK
      • S(f);SBLOCK,XS(C)::R(E)+S(D),DCHECK,XP(i)
      • S(h);OGATE,P_SPINS(h),XR(F)::QAB1(G),XS(h)
      • S(f);SBLOCK::QAB(G)+R(F),DCHECK,XP(g)
      • S(h);N_GUARD::QAB(G)+R(F),XP(i)
      • P(c);OGATEB::QAB(G)
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