MESON Chess Problem Database

Problem Display
PID: 149107 (QnB5/2BrpR2/p1rP4/1Np1kp2/4pN2/3P1PPb/3K4/4R3 w - - 0 1)

Wissmann, Dolf

Friesch Dagblad, 1980

(First published on Fri Jun 27 1980)

QnB5/2BrpR2/p1rP4/1Np1kp2/4pN2/3P1PPb/3K4/4R3

#2

12 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rb6
      • 2.Qd5#
    • 1...Rcxd6
      • 2.Qd5#
    • 1...Rcxc7
      • 2.Qd5#
    • 1...e3+
      • 2.Rxe3#
    • 1...c4
      • 2.d4#
    • 1...axb5
      • 2.Qa1#
  • Tries
    • 1.Qxc6?
      • threat
        • 2.Qd5#
        • 2.Qxc5#
      • 1...e3+
        • 2.Rxe3#
      • 1...Rxc7
        • 2.Sg6#
        • 2.Qd5#
      • 1...c4
        • 2.Qd5#
        • 2.Qc5#
        • 2.d4#
      • 1...e6
        • 2.Sg6#
        • 2.Qxc5#
      • 1...Sxc6!
    • 1.fxe4?
      • threat
        • 2.exf5#
      • 1...fxe4
        • 2.Rxe4#
      • 1...axb5
        • 2.Qa1#
      • 1...Bf1
        • 2.Rxf5#
      • 1...Bg2
        • 2.Rxf5#
      • 1...Bg4!
  • Keys
    • 1.dxe4!
      • threat
        • 2.exf5#
      • 1...Rcxd6+
        • 2.Qd5#
      • 1...Rdxd6+
        • 2.Sd3#
      • 1...fxe4
        • 2.Rxe4#
      • 1...axb5
        • 2.Qa1#
      • 1...Bf1
        • 2.Rxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(g);OGATE::QAR1(K)
    • R(g);OGATE,P_PINP(C),P_SPINR(g),XP(H)::QAR1(K)
    • R(g);OGATE,XB(I)::QAR1(K)
    • P(b);CHECK,OGATEB::R(A),XP(b)
    • P(c);N_GUARD::P(C)
    • P(f);OGATE,XS(G)::QAB(K)
  • Tries
    • Try
      • Q(K);XR(g)
      • Threat
        • DUALS(2)
      • Vars
        • P(b);CHECK,OGATEB::R(A),XP(b)
      • Refutation
        • S(j);XQ(K)
    • Try
      • P(D);XP(b)
      • Threat
        • R(A)+P(D),XP(e)
      • Vars
        • P(e);OGATE,P_SPINP(e),XP(D)::R1(A),XP(e)
        • P(f);OGATE,XS(G)::QAB(K)
        • B(a);N_GUARD::R1(J),XP(e)
      • Refutation
        • B(a);
  • Actual
    • P(C);P_SPINP(H),XP(b)
    • Threat
      • R(A)+P(C),XP(e)
    • Vars
      • R(g);CHECK,OGATE,P_SPINR(g),XP(H)::QAR1(K)
      • R(h);CHECK,P_SPINR(h),XP(H)::S(F)
      • P(e);OGATE,P_SPINP(e),XP(C)::R1(A),XP(e)
      • P(f);OGATE,XS(G)::QAB(K)
      • B(a);N_GUARD::R1(J),XP(e)
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