MESON Chess Problem Database

Problem Display
PID: 62021 (3R1qnB/5p1Q/K3B1rb/2p5/2N1kP1R/1n2r1p1/2P3P1/8 w - - 0 1)

Ellerman, Arnoldo

TVS, 1932

3R1qnB/5p1Q/K3B1rb/2p5/2N1kP1R/1n2r1p1/2P3P1/8

#2

10 + 10

81 Chess 1943

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6+
      • 2.Sxd6#
    • 1...Qe8
      • 2.Sd6#
    • 1...Rd3
      • 2.cxd3#
    • 1...Bg5
      • 2.fxg5#
    • 1...Sa1
      • 2.Sd2#
    • 1...Sc1
      • 2.Sd2#
    • 1...Sd2
      • 2.Sxd2#
    • 1...Sd4
      • 2.Sd2#
    • 1...Sa5
      • 2.Sd2#
    • 1...Se7
      • 2.Sd6#
    • 1...f5
      • 2.Qb7#
    • 1...f6
      • 2.Qb7#
  • Tries
    • 1.Rd4+?
      • 1...Sxd4
        • 2.Sd2#
      • 1...cxd4!
    • 1.Qxg6+?
      • 1...f5
        • 2.Bd5#
      • 1...fxg6!
  • Keys
    • 1.Qxf7!
      • threat
        • 2.Qb7#
      • 1...Qd6+
        • 2.Sxd6#
      • 1...Rxe6+
        • 2.Qxe6#
      • 1...Qxf7
        • 2.Sd6#
      • 1...Qxd8
        • 2.Qxg6#
        • 2.Qf5#
      • 1...Qe7
        • 2.Qxg6#
        • 2.Qf5#
      • 1...Qg7
        • 2.Qf5#
      • 1...Qe8
        • 2.Sd6#
        • 2.Qf5#
      • 1...Rd3
        • 2.cxd3#
      • 1...Rg4
        • 2.Bd5#
      • 1...Rg5
        • 2.fxg5#
      • 1...Rg7
        • 2.Bf5#
      • 1...Sd4
        • 2.Sd2#
      • 1...Sa5
        • 2.Sd2#
      • 1...Sf6
        • 2.Qxg6#
      • 1...Se7
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 7
  • Sets
    • Q(i);CHECK,N_GUARD,N_PINB(G)::S(C),XQ(i)
    • Q(i);N_GUARD::S(C)
    • R(b);OGATE::P(A),XR(b)
    • B(g);OGATE::R(E)+P(D),XB(g)
    • S(a);N_GUARD::S(C)
    • S(a);N_GUARD::S(C),XS(a)
    • S(j);S_CUTQ(i)::S(C)
    • P(h);N_SPINR(f),OGATE::QAB(H)
    • P(h);N_PINB(G),OGATE::QAB(H)
  • Tries
    • Try
      • R(I);CHECK
      • Vars
        • S(a);XR(I)::S(C)
      • Refutation
        • P(e);XR(I)
    • Try
      • Q(H);CHECK,N_SPINB(G),XR(f)
      • Vars
        • P(h);P_SPINP(h)::B(G)
      • Refutation
        • P(h);XQ(H)
  • Actual
    • Q(H);N_PINR(f),XP(h)
    • Threat
      • QAB(H)
    • Vars
      • Q(i);CHECK,N_GUARD,N_PINB(G)::S(C),XQ(i)
      • R(f);CHECK,OGATE,XB(G)::QAR2(H),XR(f)
      • Q(i);N_GUARD,XQ(H)::S(C)
      • Q(i);N_GUARD::QAB1(H)
      • R(b);OGATE::P(A),XR(b)
      • R(f);N_PINB(G)::B(G)
      • R(f);N_PINB(G),OGATE::R(E)+P(D),XR(f)
      • S(a);N_GUARD::S(C)
      • S(j);N_PINB(G),S_CUTQ(i)::QAB(H),XR(f)
      • S(j);S_CUTQ(i)::S(C)
HTML5 logo

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).