MESON Chess Problem Database

Problem Display
PID: 170038 (2nRN1qB/Np4n1/1p4Q1/1Bk5/R1P1pP2/2p4b/8/b5K1 w - - 0 1)

de Blasio, Francis JC

Enroque!!, 1946

2nRN1qB/Np4n1/1p4Q1/1Bk5/R1P1pP2/2p4b/8/b5K1

#2

10 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc4
      • 2.Rxc4#
    • 1...Qd5
      • 2.Rxd5#
    • 1...Qh7
      • 2.Rd5#
    • 1...Qxe8
      • 2.Rd5#
    • 1...Qf8
      • 2.Rd5#
    • 1...Qxh8
      • 2.Rd5#
    • 1...Sf5
      • 2.Rxc8#
    • 1...Sh5
      • 2.Bd4#
    • 1...Se6
      • 2.Rd5#
    • 1...Sxe8
      • 2.Bd4#
    • 1...Sd6
      • 2.Qxd6#
    • 1...Sxa7
      • 2.Qd6#
    • 1...Se7
      • 2.Qd6#
  • Tries
    • 1.Rxc8+?
      • 1...Bxc8
        • 2.Qd6#
      • 1...Kd4!
    • 1.Qg5+?
      • 1...Qd5
        • 2.Rxd5#
        • 2.Qxd5#
      • 1...Sf5
        • 2.Bd4#
        • 2.Rxc8#
      • 1...Bf5!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qe3#
      • 1...Qxc4
        • 2.Rxc4#
      • 1...Sxe8
        • 2.Bd4#
      • 1...Qd5
        • 2.Rxd5#
      • 1...Sf5
        • 2.Rxc8#
      • 1...Sh5
        • 2.Bd4#
      • 1...Se6
        • 2.Rd5#
      • 1...c2
        • 2.Qa3#
      • 1...e3
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • Q(j);OGATE,XP(C)::R1(B),XQ(j)
    • Q(j);N_GUARD::R1(H),XQ(j)
    • Q(j);N_GUARD::R1(H)
    • Q(j);N_GUARD,XS(I)::R1(H)
    • Q(j);N_GUARD,XB(J)::R1(H)
    • S(h);P_PINQ(F),S_CUTB(c)::R(H),XS(i)
    • S(h);OGATE,P_PINQ(F)::B(J)
    • S(h);P_PINQ(F),S_CUTQ(j)::R1(H)
    • S(h);OGATE,P_PINQ(F),XS(I)::B(J)
    • S(i);N_GUARD::QAB1(F),XS(i)
    • S(i);N_GUARD,XS(G)::QAB1(F)
    • S(i);N_GUARD::QAB1(F)
  • Tries
    • Try
      • R(H);CHECK,XS(i)
      • Vars
        • B(c);XR(H)::QAB1(F)
      • Refutation
        • K(e);P_SPINS(h),S_FLIGHT
    • Try
      • Q(F);CHECK
      • Refutation
        • B(c);P_SPINB(c)
  • Actual
    • Q(F);
    • Threat
      • QAB(F)
    • Vars
      • Q(j);OGATE,XP(C)::R1(B),XQ(j)
      • S(h);OGATE,P_PINQ(F),XS(I)::B(J)
      • Q(j);N_GUARD::R1(H),XQ(j)
      • S(h);P_PINQ(F),S_CUTB(c)::R(H),XS(i)
      • S(h);OGATE,P_PINQ(F)::B(J)
      • S(h);P_PINQ(F),S_CUTQ(j)::R1(H)
      • P(b);OGATE::QAB(F)
      • P(d);::QAB(F),XP(d)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).