Problem Display
PID: 71272 (2R2n2/R7/8/P7/P2k1Pp1/3P1qp1/BN1PPbQ1/B1NK3b w - - 0 1)

Nietvelt, Gustaaf Josephus

64 Shakhmatnoe obozrenie, 1930

2R2n2/R7/8/P7/P2k1Pp1/3P1qp1/BN1PPbQ1/B1NK3b

#2

14 + 7


56 The Problemist 2006

SOLUTION


  • SOUND
  • Sets
    • 1...Qxe2+
      • 2.Sxe2#
    • 1...Qd5
      • 2.Sc4#
    • 1...Qc6
      • 2.Sb3#
    • 1...Qb7
      • 2.Rc4#
    • 1...Qa8
      • 2.Sb3#
      • 2.Sc4#
      • 2.Rc4#
    • 1...Qxd3
      • 2.Sbxd3#
    • 1...Qe3
      • 2.Sb3#
      • 2.Sc4#
      • 2.Rc4#
    • 1...Qxf4
      • 2.Sc4#
  • Tries
    • 1.Kc2?
      • threat
        • 2.Sd1#
      • 1...Qxd3+
        • 2.Sbxd3#
      • 1...Qb7
        • 2.Rc4#
      • 1...Qc6+!
    • 1.Be6?
      • threat
        • 2.Sb3#
        • 2.Sc4#
        • 2.Rc4#
      • 1...Qxe2+
        • 2.Sxe2#
      • 1...Qxd3
        • 2.Sbxd3#
      • 1...Qxf4
        • 2.Sc4#
      • 1...Qc6
        • 2.Sb3#
      • 1...Qd5
        • 2.Sc4#
      • 1...Qb7
        • 2.Rc4#
      • 1...Sxe6!
    • 1.Bf7?
      • threat
        • 2.Sb3#
        • 2.Sc4#
        • 2.Rc4#
      • 1...Qxe2+
        • 2.Sxe2#
      • 1...Qxd3
        • 2.Sbxd3#
      • 1...Qxf4
        • 2.Sc4#
      • 1...Qc6
        • 2.Sb3#
      • 1...Qd5
        • 2.Sc4#
      • 1...Qb7
        • 2.Rc4#
      • 1...Se6!
    • 1.Bg8?
      • threat
        • 2.Sb3#
        • 2.Sc4#
        • 2.Rc4#
      • 1...Qxe2+
        • 2.Sxe2#
      • 1...Qxd3
        • 2.Sbxd3#
      • 1...Qxf4
        • 2.Sc4#
      • 1...Qc6
        • 2.Sb3#
      • 1...Qd5
        • 2.Sc4#
      • 1...Qb7
        • 2.Rc4#
      • 1...Se6!
    • 1.Rd7+?
      • 1...Qd5
        • 2.Sb3#
        • 2.Sc4#
        • 2.Rxd5#
        • 2.Rc4#
      • 1...Sxd7!
  • Keys
    • 1.Rb7!
      • threat
        • 2.Rb4#
      • 1...Qxe2+
        • 2.Sxe2#
      • 1...Qxb7
        • 2.Rc4#
      • 1...Qxd3
        • 2.Sbxd3#
      • 1...Qxf4
        • 2.Sc4#
      • 1...Qc6
        • 2.Sb3#
      • 1...Qd5
        • 2.Sc4#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • Q(c);CHECK,XP(G)::S(B),XQ(c)
    • Q(c);N_PINP(G)::B(A)+S(E)
    • Q(c);N_PINP(G)::S(B)
    • Q(c);N_PINP(G)::R1(N)
    • Q(c);N_PINP(G),P_PINP(F),XP(I)::B(A)+S(E),XQ(c)
    • Q(c);N_PINP(G),XP(K)::B(A)+S(E)
  • Tries
    • Try
      • K(C);N_SPINP(G),S_FLIGHT
      • Threat
        • B(A)+S(E)
      • Vars
        • Q(c);CHECK,XP(I)::B(A)+S(E),XQ(c)
        • Q(c);::R1(N)
      • Refutation
        • Q(c);CHECK
    • Try
      • B(D);
      • Threat
        • DUALS(3)
      • Vars
        • Q(c);CHECK,XP(G)::S(B),XQ(c)
        • Q(c);N_PINP(G),P_PINP(F),XP(I)::B(A)+S(E),XQ(c)
        • Q(c);N_PINP(G),XP(K)::B(A)+S(E)
        • Q(c);N_PINP(G)::S(B)
        • Q(c);N_PINP(G)::B(A)+S(E)
        • Q(c);N_PINP(G)::R1(N)
      • Refutation
        • S(g);XB(D)
    • Try
      • B(D);
      • Threat
        • DUALS(3)
      • Vars
        • Q(c);CHECK,XP(G)::S(B),XQ(c)
        • Q(c);N_PINP(G),P_PINP(F),XP(I)::B(A)+S(E),XQ(c)
        • Q(c);N_PINP(G),XP(K)::B(A)+S(E)
        • Q(c);N_PINP(G)::S(B)
        • Q(c);N_PINP(G)::B(A)+S(E)
        • Q(c);N_PINP(G)::R1(N)
      • Refutation
        • S(g);
    • Try
      • B(D);
      • Threat
        • DUALS(3)
      • Vars
        • Q(c);CHECK,XP(G)::S(B),XQ(c)
        • Q(c);N_PINP(G),P_PINP(F),XP(I)::B(A)+S(E),XQ(c)
        • Q(c);N_PINP(G),XP(K)::B(A)+S(E)
        • Q(c);N_PINP(G)::S(B)
        • Q(c);N_PINP(G)::B(A)+S(E)
        • Q(c);N_PINP(G)::R1(N)
      • Refutation
        • S(g);
    • Try
      • R(M);CHECK
      • Refutation
        • S(g);XR(M)
  • Actual
    • R(M);
    • Threat
      • R(M)
    • Vars
      • Q(c);CHECK,XP(G)::S(B),XQ(c)
      • Q(c);N_PINP(G),XR(M)::R1(N)
      • Q(c);N_PINP(G),P_PINP(F),XP(I)::B(A)+S(E),XQ(c)
      • Q(c);N_PINP(G),XP(K)::B(A)+S(E)
      • Q(c);N_PINP(G)::S(B)
      • Q(c);N_PINP(G)::B(A)+S(E)


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).