MESON Chess Problem Database

Problem Display
PID: 143943 (8/1R6/Rr2kP2/5Npr/nP2p1Bp/2P1K3/qPP4B/5Q2 w - - 0 1)

Grunfeld, Max

La Settimana Enigmistica, 1932

(First published on Sat Sep 3 1932)

8/1R6/Rr2kP2/5Npr/nP2p1Bp/2P1K3/qPP4B/5Q2

#2

12 + 8

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Se7#
    • 1...Kxf6
      • 2.Sxh4#
    • 1...Qd5
      • 2.Sd4#
      • 2.Sg7#
    • 1...Rd6
      • 2.Rxd6#
  • Tries
    • 1.Raxb6+?
      • 1...Kd5
        • 2.Se7#
        • 2.Rd6#
        • 2.Rd7#
      • 1...Sxb6!
    • 1.Rd7?
      • threat
        • 2.Sd4#
        • 2.Sxh4#
        • 2.Sh6#
        • 2.Sg7#
      • 1...Kxf6
        • 2.Sxh4#
      • 1...Rd6
        • 2.Raxd6#
      • 1...Qd5
        • 2.Sd4#
        • 2.Sg7#
      • 1...Rh6
        • 2.Sd4#
        • 2.Sxh4#
        • 2.Sxh6#
        • 2.Sg7#
      • 1...h3
        • 2.Sd4#
        • 2.Sh4#
        • 2.Sh6#
        • 2.Sg7#
      • 1...Kxd7!
    • 1.Rg7?
      • threat
        • 2.Se7#
      • 1...Kd5
        • 2.Se7#
      • 1...Qd5
        • 2.Sd4#
      • 1...Kxf6!
    • 1.Rh7?
      • threat
        • 2.Se7#
      • 1...Kd5
        • 2.Se7#
      • 1...Kxf6
        • 2.Sxh4#
        • 2.Se7#
      • 1...Qd5
        • 2.Sd4#
      • 1...Rxh7!
    • 1.f7?
      • threat
        • 2.Se7#
      • 1...Kd5
        • 2.Se7#
      • 1...Qd5
        • 2.Sd4#
        • 2.Sg7#
      • 1...Kf6!
  • Keys
    • 1.Kd2!
      • threat
        • 2.Se3#
      • 1...Qd5+
        • 2.Sd4#
      • 1...Rd6+
        • 2.Rxd6#
      • 1...e3+
        • 2.Sxe3#
      • 1...Kd5
        • 2.Se7#
      • 1...Kxf6
        • 2.Sxh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(h);N_SPINR(g),S_FLIGHT::S(I)
    • K(h);P-FLIGHT,XP(K)::QAR(A)+S(I),XP(d)
    • R(g);OGATE::R1(J),XR(g)
  • Tries
    • Try
      • R(J);CHECK,XR(g)
      • Refutation
        • S(b);XR(J)
    • Try
      • R(L);
      • Threat
        • DUALS(4)
      • Vars
        • K(h);P-FLIGHT,XP(K)::QAR(A)+S(I),XP(d)
        • R(g);OGATE::R1(J),XR(g)
      • Refutation
        • K(h);N_SPINR(g),S_FLIGHT,XR(L)
    • Try
      • R(L);
      • Threat
        • B(H)+S(I)
      • Vars
        • K(h);N_SPINR(g),S_FLIGHT::S(I)
        • Q(a);SBLOCK::B(H)+S(I),DCHECK
      • Refutation
        • K(h);P-FLIGHT,XP(K)
    • Try
      • R(L);
      • Threat
        • B(H)+S(I)
      • Vars
        • K(h);N_SPINR(g),S_FLIGHT::S(I)
        • Q(a);SBLOCK::B(H)+S(I),DCHECK
      • Refutation
        • R(f);XR(L)
    • Try
      • P(K);
      • Threat
        • B(H)+S(I)
      • Vars
        • K(h);N_SPINR(g),S_FLIGHT::S(I)
      • Refutation
        • K(h);P-FLIGHT
  • Actual
    • K(F);S_FLIGHT
    • Threat
      • B(H)+S(I)
    • Vars
      • Q(a);CHECK,SBLOCK::B(H)+S(I),DCHECK
      • R(g);CHECK,OGATE::R1(J),XR(g)
      • P(c);CHECK::B(H)+S(I),XP(c)
      • K(h);N_SPINR(g),S_FLIGHT::S(I)
      • K(h);P-FLIGHT,XP(K)::QAR(A)+S(I),XP(d)
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