MESON Chess Problem Database

Problem Display
PID: 87749 (3b4/2B4n/6QK/2PP2pp/1p2N1b1/r3kpN1/n2R1RPP/2r2B2 w - - 0 1)

Rehn, Gunnar

Problemisten, 1949

3b4/2B4n/6QK/2PP2pp/1p2N1b1/r3kpN1/n2R1RPP/2r2B2

#2

12 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf1
      • 2.Sxf1#
    • 1...Rd3
      • 2.Rxd3#
    • 1...Ra4
      • 2.Rd3#
    • 1...Ra5
      • 2.Rd3#
    • 1...Ra6
      • 2.Rd3#
    • 1...Ra7
      • 2.Rd3#
    • 1...Ra8
      • 2.Rd3#
    • 1...Bh3
      • 2.Rxf3#
    • 1...Bf5
      • 2.Rxf3#
    • 1...Be6
      • 2.Rxf3#
    • 1...Bd7
      • 2.Rxf3#
    • 1...Bc8
      • 2.Rxf3#
    • 1...Sc3
      • 2.Rd3#
    • 1...Sf6
      • 2.Qxg5#
    • 1...b3
      • 2.Rd3#
  • Tries
    • 1.Sf5+?
      • 1...Kxe4
        • 2.Rd4#
        • 2.Qe6#
      • 1...Bxf5!
    • 1.Sc3?
      • threat
        • 2.Qd3#
        • 2.Qe4#
      • 1...Rcxc3
        • 2.Qe4#
      • 1...Raxc3
        • 2.Qe4#
      • 1...Bxc7
        • 2.Qe4#
      • 1...Sxc3
        • 2.Qd3#
      • 1...Bf5
        • 2.Sxf5#
      • 1...Sf6
        • 2.Qd3#
        • 2.Qxg5#
      • 1...Ra6!
    • 1.Sf6?
      • threat
        • 2.Qe4#
      • 1...Sxf6
        • 2.Qxg5#
      • 1...Bf5
        • 2.Sxf5#
      • 1...Sc3
        • 2.Qd3#
      • 1...Rc4!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Qe4#
      • 1...Kf4
        • 2.Qe4#
      • 1...Rc4
        • 2.Sxc4#
      • 1...Bf5
        • 2.Sdxf5#
      • 1...Sc3
        • 2.Sc4#
      • 1...Sf6
        • 2.Qxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 12
  • Sets
    • R(a);XB(A)::S(F),XR(a)
    • R(c);N_GUARD::R1(B),XR(c)
    • R(c);N_GUARD::R1(B)
    • R(c);N_GUARD,P_PINQ(J)::R1(B)
    • B(g);N_GUARD::R1(C),XP(e)
    • S(b);S_CUTR(c)::R1(B)
    • S(j);N_GUARD,S_CUTB(k)::QAB(J),XP(h)
    • P(f);S_CUTR(c)::R1(B)
  • Tries
    • Try
      • S(F);CHECK
      • Refutation
        • B(g);XS(F)
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);XS(G)::QAR1(J)
        • R(c);XS(G)::QAR1(J)
        • B(k);XB(L)::QAR1(J)
        • S(b);XS(G)::QAR1(J)
        • B(g);N_GUARD::S(F),XB(g)
      • Refutation
        • R(c);P_PINQ(J)
    • Try
      • S(G);
      • Threat
        • QAR1(J)
      • Vars
        • S(j);N_GUARD,XS(G)::QAB(J),XP(h)
        • B(g);N_GUARD::S(F),XB(g)
        • S(b);S_CUTR(c)::QAR1(J)
      • Refutation
        • R(a);
  • Actual
    • S(G);
    • Threat
      • QAR1(J)
    • Vars
      • K(d);P_SPINP(e),S_FLIGHT::QAR1(J)
      • R(a);N_GUARD::S(G),XR(a)
      • B(g);N_GUARD::S(G),XB(g)
      • S(b);S_CUTR(a)::S(G)
      • S(j);N_GUARD,S_CUTB(k)::QAB(J),XP(h)
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