MESON Chess Problem Database

Problem Display
PID: 176588 (B7/2P1K1pb/1bRp2N1/1p1kp1Q1/2p1p1N1/8/1r2n3/B5r1 w - - 0 1)

Haring, Jacobus

Schach-Echo, 1980

B7/2P1K1pb/1bRp2N1/1p1kp1Q1/2p1p1N1/8/1r2n3/B5r1

#2

8 + 12

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qd2#
    • 1...Bc5
      • 2.Rxd6#
    • 1...Sd4
      • 2.Se3#
      • 2.Sf4#
  • Tries
    • 1.Sf6+?
      • 1...Kd4
        • 2.Qd2#
      • 1...gxf6!
    • 1.S6xe5?
      • threat
        • 2.Rxc4#
      • 1...Kd4
        • 2.Qd2#
      • 1...dxe5
        • 2.Qxe5#
      • 1...Ra2
        • 2.Sg6#
      • 1...Bc5
        • 2.Rxd6#
      • 1...Sd4
        • 2.Se3#
      • 1...c3
        • 2.Rc4#
      • 1...Rxa1!
    • 1.Rc5+?
      • 1...Kd4
        • 2.Qe3#
      • 1...Kxc5!
    • 1.Rxb6+?
      • 1...Kd4
        • 2.Qe3#
      • 1...Kc5!
    • 1.Qd2+?
      • 1...Bd4
        • 2.Se3#
      • 1...Sd4
        • 2.Se3#
      • 1...Rxd2!
  • Keys
    • 1.S4xe5!
      • threat
        • 2.Rxc4#
      • 1...Kd4
        • 2.Qd2#
      • 1...Rxa1
        • 2.Sf3#
      • 1...dxe5
        • 2.Qxe5#
      • 1...Ra2
        • 2.Sg4#
      • 1...Bc5
        • 2.Rxd6#
      • 1...Sd4
        • 2.Sf4#
      • 1...c3
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(g);N_SPINP(h),P-FLIGHT,P_SPINR(b)::QAR2(C)
    • B(i);SBLOCK::B(H)+R(D),DCHECK,XP(j)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(g);N_SPINP(h),P-FLIGHT,P_SPINR(b)::QAR2(C)
      • Refutation
        • P(k);XS(B)
    • Try
      • S(E);XP(h)
      • Threat
        • B(H)+R(D),XP(d)
      • Vars
        • K(g);P-FLIGHT,P_SPINR(b)::QAR2(C)
        • P(j);OGATE,P_SPINP(j),XS(E)::QAR1(C),XP(j)
        • R(b);::QAR(C)+S(E)
        • B(i);SBLOCK::B(H)+R(D),DCHECK,XP(j)
        • S(c);SBLOCK,S_CUTB(i)::S(B)
        • P(d);::B(H)+R(D)
      • Refutation
        • R(a);XB(A)
    • Try
      • R(D);CHECK
      • Vars
        • K(g);N_SPINP(h),P-FLIGHT,P_SPINR(b)::QAB1(C)
      • Refutation
        • K(g);P-FLIGHT,XR(D)
    • Try
      • R(D);CHECK,XB(i)
      • Vars
        • K(g);N_SPINP(h),P-FLIGHT,P_SPINR(b)::QAB1(C)
      • Refutation
        • K(g);P-FLIGHT
    • Try
      • Q(C);CHECK,N_PINP(h)
      • Vars
        • B(i);P_SPINB(i)::S(B)
        • S(c);P_SPINS(c)::S(B)
      • Refutation
        • R(b);XQ(C)
  • Actual
    • S(B);XP(h)
    • Threat
      • B(H)+R(D),XP(d)
    • Vars
      • K(g);P-FLIGHT,P_SPINR(b)::QAR2(C)
      • R(a);N_GUARD,XB(A)::QAR(C)+S(B)
      • P(j);OGATE,P_SPINP(j),XS(B)::QAR1(C),XP(j)
      • R(b);::QAR(C)+S(B)
      • B(i);SBLOCK::B(H)+R(D),DCHECK,XP(j)
      • S(c);N_GUARD,SBLOCK::S(E)
      • P(d);::B(H)+R(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).