MESON Chess Problem Database

Problem Display
PID: 63584 (3rqn2/1NP3p1/3pP2b/p2k1P2/p4p2/3K4/P2N4/BQRR4 w - - 0 1)

Hannelius, Jan Ingvar

5th HM., Cacciari MT, 1974

3rqn2/1NP3p1/3pP2b/p2k1P2/p4p2/3K4/P2N4/BQRR4

#2

11 + 10

3771 FIDE Album (1974-1976) 1980

SOLUTION

  • SOUND
  • Sets
    • 1...Qb5+
      • 2.Qxb5#
    • 1...Qh5
      • 2.Qb5#
    • 1...Qg6
      • 2.Qb5#
    • 1...Qf7
      • 2.Qb5#
    • 1...Qxe6
      • 2.Qb5#
    • 1...Qe7
      • 2.Qb5#
    • 1...Rd7
      • 2.Qb5#
    • 1...a3
      • 2.Qb3#
  • Tries
    • 1.Ke2?
      • threat
        • 2.Sf1#
        • 2.Sb3#
        • 2.Sf3#
        • 2.Se4#
        • 2.Qd3#
        • 2.Qe4#
      • 1...Qb5+
        • 2.Qxb5#
      • 1...Qh5+
        • 2.Sf3#
      • 1...Qxe6+
        • 2.Se4#
      • 1...Sxe6
        • 2.Qe4#
      • 1...f3+!
    • 1.Sf3?
      • threat
        • 2.Ke2#
      • 1...Qb5+
        • 2.Qxb5#
      • 1...Qxe6
        • 2.Qb5#
      • 1...Sxe6!
    • 1.Sc4?
      • threat
        • 2.Sb6#
      • 1...Kc6
        • 2.Se3#
      • 1...Qb5
        • 2.Qxb5#
      • 1...Qc6
        • 2.Ke2#
        • 2.Kc3#
      • 1...Sd7!
    • 1.Qc2?
      • threat
        • 2.Qc4#
      • 1...Qc6
        • 2.Qxc6#
      • 1...Qb5+!
    • 1.Qb2?
      • threat
        • 2.Qd4#
      • 1...Qb5+
        • 2.Qxb5#
      • 1...Sxe6!
    • 1.Qb4?
      • threat
        • 2.Qc4#
        • 2.Qd4#
        • 2.Qe4#
      • 1...Qb5+
        • 2.Qxb5#
      • 1...Qxe6
        • 2.Qxa5#
        • 2.Qc4#
        • 2.Qd4#
        • 2.Qb5#
      • 1...Sxe6
        • 2.Qc4#
        • 2.Qe4#
      • 1...Qc6
        • 2.Qd4#
        • 2.Qe4#
      • 1...axb4!
    • 1.Qb6?
      • threat
        • 2.Qd4#
      • 1...Qb5+
        • 2.Qxb5#
      • 1...Sxe6!
    • 1.a3?
      • threat
        • 2.Qa2#
      • 1...Qb5+
        • 2.Qxb5#
      • 1...Qc6!
    • 1.c8Q?
      • threat
        • 2.Qc4#
      • 1...Qb5+
        • 2.Qxb5#
      • 1...Qc6
        • 2.Qxc6#
      • 1...Rxc8!
  • Keys
    • 1.Kc3!
      • threat
        • 2.Qe4#
      • 1...Qc6+
        • 2.Sc4#
      • 1...Ke5
        • 2.Kc4#
      • 1...Kc6
        • 2.Kd4#
      • 1...Qxe6
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • Q(i);CHECK,N_GUARD::QAR2(B),XQ(i)
    • Q(i);N_GUARD::QAR2(B)
    • Q(i);N_GUARD,P_PINP(H)::QAR2(B)
    • Q(i);N_GUARD,XP(I)::QAR2(B)
    • R(h);S_CUTQ(i)::QAR2(B)
    • P(a);N_GUARD::QAB(B)
  • Tries
    • Try
      • K(G);P_SPINP(I),S_FLIGHT
      • Threat
        • DUALS(6)
      • Vars
        • Q(i);CHECK,N_GUARD,N_PINP(I)::QAR2(B),XQ(i)
        • Q(i);CHECK,N_PINP(I)::R(D)+S(F)
        • Q(i);CHECK,XP(I)::R(D)+S(F)
        • S(j);XP(I)::QAB1(B)
      • Refutation
        • P(b);CHECK
    • Try
      • S(F);
      • Threat
        • R(D)+K(G)
      • Vars
        • Q(i);CHECK,N_GUARD::QAR2(B),XQ(i)
        • Q(i);N_GUARD,XP(I)::QAR2(B)
      • Refutation
        • S(j);XP(I)
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • K(d);S_FLIGHT::R(C)+S(F)
        • Q(i);N_GUARD,P_PINS(F)::QAR2(B),XQ(i)
      • Refutation
        • S(j);
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • Q(i);N_GUARD::QAB1(B),XQ(i)
      • Refutation
        • Q(i);CHECK
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • Q(i);CHECK,N_GUARD::QAR2(B),XQ(i)
      • Refutation
        • S(j);XP(I)
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Vars
        • Q(i);CHECK,N_GUARD::QAR2(B),XQ(i)
      • Refutation
        • P(c);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • Q(i);CHECK,N_GUARD::QAR2(B),XQ(i)
      • Refutation
        • S(j);XP(I)
    • Try
      • P(E);
      • Threat
        • QAB(B)
      • Vars
        • Q(i);CHECK,N_GUARD::QAR2(B),XQ(i)
      • Refutation
        • Q(i);
    • Try
      • P(K);
      • Threat
        • QAB1(K)
      • Vars
        • Q(i);CHECK,N_GUARD::QAR2(B),XQ(i)
        • Q(i);N_GUARD::QAB1(K),XQ(i)
      • Refutation
        • R(h);XQ(K)
  • Actual
    • K(G);P-FLIGHT
    • Threat
      • QAB1(B)
    • Vars
      • Q(i);CHECK,SBLOCK::R(D)+S(F)
      • K(d);P-FLIGHT::B(A)+K(G)
      • K(d);S_FLIGHT::R(C)+K(G)
      • Q(i);N_GUARD,XP(I)::QAR2(B)
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