MESON Chess Problem Database

Problem Display
PID: 96911 (3r1B2/1P6/QRPbB3/1pk1n3/br4p1/N1P2pN1/qn1R3K/8 w - - 0 1)

Wrobel, Marian

The Chess Problem, 1947

3r1B2/1P6/QRPbB3/1pk1n3/br4p1/N1P2pN1/qn1R3K/8

#2

11 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Rd5#
    • 1...Qd5
      • 2.Rxd5#
    • 1...Qa1
      • 2.Rd5#
    • 1...Rb3
      • 2.Se4#
      • 2.Rd5#
    • 1...Rc4
      • 2.Rd5#
    • 1...Re4
      • 2.Sxe4#
    • 1...Ra8
      • 2.Bxd6#
    • 1...Rb8
      • 2.Bxd6#
    • 1...Rc8
      • 2.Bxd6#
    • 1...Re8
      • 2.Bxd6#
    • 1...Sbc4
      • 2.Se4#
    • 1...Sec4
      • 2.Rd5#
    • 1...Sxc6
      • 2.Rxc6#
    • 1...Sd7
      • 2.Bxd6#
  • Tries
    • 1.Rxb5+?
      • 1...Rxb5
        • 2.Se4#
      • 1...Bxb5!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Ra6#
      • 1...Sxc6
        • 2.Rxb5#
      • 1...Ra8
        • 2.Bxd6#
      • 1...Sbc4
        • 2.Se4#
      • 1...Sec4
        • 2.Rd5#
      • 1...Sd7
        • 2.Bxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 8
  • Sets
    • Q(a);N_GUARD::R1(A)
    • Q(a);N_GUARD::R1(A),XQ(a)
    • R(e);S_CUTQ(a)::R1(A)
    • R(e);N_GUARD::S(E),XR(e)
    • R(k);N_GUARD::B(K),XB(j)
    • S(b);P_PINR(A),S_CUTR(e)::S(E)
    • S(i);P_PINS(E),S_CUTQ(a)::R1(A)
    • S(i);OGATE,P_PINS(E),XP(H)::R1(G),XS(i)
    • S(i);P_PINS(E),S_CUTR(k)::B(K),XB(j)
  • Tries
    • Try
      • R(G);CHECK,XP(g)
      • Vars
        • R(e);XR(G)::S(E)
      • Refutation
        • B(d);XR(G)
  • Actual
    • Q(F);
    • Threat
      • QAB(F)+R(G)
    • Vars
      • S(i);P_PINS(E),SBLOCK,XP(H)::QAB(F)+R(G),DCHECK,XP(g)
      • R(k);N_GUARD::B(K),XB(j)
      • S(b);P_PINR(A),S_CUTR(e)::S(E)
      • S(i);P_PINS(E),S_CUTQ(a)::R1(A)
      • S(i);P_PINS(E),S_CUTR(k)::B(K),XB(j)
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