MESON Chess Problem Database

Problem Display
PID: 83730 (8/2pr1Q2/7b/2Bp4/1N1Np1p1/K2pk1r1/R7/3B3n w - - 0 1)

Ellerman, Arnoldo

Problemas, 1966

8/2pr1Q2/7b/2Bp4/1N1Np1p1/K2pk1r1/R7/3B3n

#2

7 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re7
      • 2.Sxd5#
    • 1...Rxf7
      • 2.Sxd5#
    • 1...Bf4
      • 2.Sf5#
    • 1...Sf2
      • 2.Qxf2#
    • 1...d2
      • 2.Sdc2#
  • Tries
    • 1.Rf2?
      • threat
        • 2.Sdc2#
        • 2.Sf5#
      • 1...Rf3
        • 2.Sdc2#
      • 1...Sxf2!
    • 1.Rg2?
      • threat
        • 2.Sdc2#
      • 1...Rxf7
        • 2.Sxd5#
      • 1...Sf2
        • 2.Qxf2#
      • 1...Rxg2!
    • 1.Rh2?
      • threat
        • 2.Sdc2#
      • 1...Rxf7
        • 2.Sxd5#
      • 1...Sf2
        • 2.Qxf2#
      • 1...Rg2!
    • 1.Qf1?
      • threat
        • 2.Sf5#
      • 1...Sf2
        • 2.Qxf2#
      • 1...Rf3!
    • 1.Qf4+?
      • 1...Bxf4
        • 2.Sf5#
      • 1...Kxf4!
  • Keys
    • 1.Qxd5!
      • threat
        • 2.Se6#
      • 1...Kf4
        • 2.Se6#
      • 1...Rxd5
        • 2.Sxd5#
      • 1...Bg7
        • 2.Qg5#
      • 1...Bf8
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • R(j);N_GUARD::S(D),XP(g)
    • R(j);N_GUARD,XQ(G)::S(D),XP(g)
    • B(h);SBLOCK::B(F)+S(E),DCHECK
    • S(a);N_GUARD::QAB1(G),XS(a)
    • P(b);SBLOCK::B(F)+S(E),DCHECK
  • Tries
    • Try
      • R(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(d);::B(F)+S(E),DCHECK
      • Refutation
        • S(a);XR(B)
    • Try
      • R(B);
      • Threat
        • B(F)+S(E),DCHECK
      • Vars
        • R(j);N_GUARD,XQ(G)::S(D),XP(g)
        • S(a);N_GUARD::QAB1(G),XS(a)
      • Refutation
        • R(d);XR(B)
    • Try
      • R(B);
      • Threat
        • B(F)+S(E),DCHECK
      • Vars
        • R(j);N_GUARD,XQ(G)::S(D),XP(g)
        • S(a);N_GUARD::QAB1(G),XS(a)
      • Refutation
        • R(d);
    • Try
      • Q(G);
      • Threat
        • B(F)+S(E),DCHECK
      • Vars
        • S(a);N_GUARD::QAB1(G),XS(a)
      • Refutation
        • R(d);
    • Try
      • Q(G);CHECK
      • Vars
        • B(h);SBLOCK,XQ(G)::B(F)+S(E),DCHECK
      • Refutation
        • K(c);S_FLIGHT,XQ(G)
  • Actual
    • Q(G);XP(g)
    • Threat
      • B(F)+S(E)
    • Vars
      • K(c);S_FLIGHT::S(E)
      • R(j);XQ(G)::S(D),XR(j)
      • B(h);N_GUARD::QAB(G)
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