MESON Chess Problem Database

Problem Display
PID: 252321 (7Q/1NRb4/q3kB1K/Rn3p2/2N1pp2/2p4p/B1r5/3r4 w - - 0 1)

Hirschenson, Aaron

Retter, Yosef

Zadachi i Etyudi, 2004

7Q/1NRb4/q3kB1K/Rn3p2/2N1pp2/2p4p/B1r5/3r4

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Sb2#
      • 2.Se3#
      • 2.Sb6#
    • 1...Kf7
      • 2.Se5#
      • 2.Scd6#
      • 2.Sd8#
    • 1...Rb1
      • 2.Sb2#
    • 1...Rdc1
      • 2.Sb2#
    • 1...Re1
      • 2.Sb2#
    • 1...Rf1
      • 2.Sb2#
    • 1...Rg1
      • 2.Sb2#
    • 1...Rh1
      • 2.Sb2#
    • 1...Rd5
      • 2.Sd8#
    • 1...Rcc1
      • 2.Sd2#
    • 1...Rd2
      • 2.Sxd2#
    • 1...Re2
      • 2.Sd2#
    • 1...Rf2
      • 2.Sd2#
    • 1...Rg2
      • 2.Sd2#
    • 1...Rh2
      • 2.Sd2#
    • 1...Sa3
      • 2.Sd8#
    • 1...Sd4
      • 2.Sd8#
    • 1...Sd6
      • 2.Sd8#
    • 1...Sa7
      • 2.Sd8#
    • 1...Sxc7
      • 2.Sd8#
  • Tries
    • 1.Se3+?
      • 1...Rd5
        • 2.Bxd5#
      • 1...Rxa2!
    • 1.Sb6+?
      • 1...Rd5
        • 2.Bxd5#
      • 1...Rxa2!
    • 1.Sc5+?
      • 1...Kf7
        • 2.Se5#
        • 2.Sd6#
      • 1...Kd5!
    • 1.Bh4?
      • threat
        • 2.Qg8#
      • 1...Kd5+
        • 2.Sb6#
      • 1...Kf7+
        • 2.Scd6#
      • 1...Rg1
        • 2.Sb2#
      • 1...Rg2
        • 2.Sd2#
      • 1...Be8
        • 2.Qe5#
      • 1...Sd6
        • 2.Sd8#
        • 2.Qf6#
      • 1...Qa8!
    • 1.Bg5?
      • threat
        • 2.Qg8#
      • 1...Kd5+
        • 2.Sb6#
      • 1...Kf7+
        • 2.Scd6#
      • 1...Be8
        • 2.Qe5#
      • 1...Sd6
        • 2.Sd8#
        • 2.Qf6#
      • 1...Qa8!
  • Keys
    • 1.Bd8!
      • threat
        • 2.Qg8#
      • 1...Kd5+
        • 2.Sb6#
      • 1...Kf7+
        • 2.Scd6#
      • 1...Rg1
        • 2.Sb2#
      • 1...Rg2
        • 2.Sd2#
      • 1...Be8
        • 2.Qe5#
      • 1...Sd6
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 15
  • Sets
    • R(a);N_GUARD::B(A)+S(B)
    • R(a);SBLOCK::S(F)
    • R(b);N_GUARD::B(A)+S(B)
    • R(b);N_GUARD::B(A)+S(B),XR(b)
    • S(g);::S(F)
    • S(g);XR(G)::S(F)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::B(A),XR(a)
      • Refutation
        • R(b);XB(A)
    • Try
      • S(B);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::B(A),XR(a)
      • Refutation
        • R(b);XB(A)
    • Try
      • S(F);CHECK
      • Refutation
        • K(j);P_PINB(D),S_FLIGHT
    • Try
      • B(D);
      • Threat
        • QAB(H)
      • Vars
        • K(j);CHECK,P_SPINS(g),S_FLIGHT::B(A)+S(B),DCHECK
        • K(j);CHECK,P_SPINB(k),S_FLIGHT::B(A)+S(B),DCHECK
        • R(a);N_GUARD::B(A)+S(B)
        • R(b);N_GUARD::B(A)+S(B)
        • B(k);::QAR1(H)
      • Refutation
        • Q(i);
    • Try
      • B(D);
      • Threat
        • QAB(H)
      • Vars
        • K(j);CHECK,P_SPINS(g),S_FLIGHT::B(A)+S(B),DCHECK
        • K(j);CHECK,P_SPINB(k),S_FLIGHT::B(A)+S(B),DCHECK
        • B(k);::QAR1(H)
      • Refutation
        • Q(i);
  • Actual
    • B(D);
    • Threat
      • QAB(H)
    • Vars
      • K(j);CHECK,P_SPINS(g),S_FLIGHT::B(A)+S(B),DCHECK
      • K(j);CHECK,P_SPINB(k),S_FLIGHT::B(A)+S(B),DCHECK
      • R(a);N_GUARD::B(A)+S(B)
      • R(b);N_GUARD::B(A)+S(B)
      • B(k);::QAR1(H)
      • S(g);::QAR1(H)
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