MESON Chess Problem Database

Problem Display
PID: 109452 (2rr4/nN5b/4P2R/3kp3/2R2pN1/2p4p/Q6K/n4BB1 w - - 0 1)

Strzala, Kazimierz

4th Comm., Szachista, 1991-1992

2rr4/nN5b/4P2R/3kp3/2R2pN1/2p4p/Q6K/n4BB1

#2

9 + 10

6490 yacpdb 2009
23 Die Schwalbe 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc4
      • 2.Qxc4#
    • 1...Rc6
      • 2.Rd4#
    • 1...Be4
      • 2.Rc5#
    • 1...Sc6
      • 2.Rd4#
    • 1...f3
      • 2.Se3#
    • 1...e4
      • 2.Rc5#
  • Tries
    • 1.Bg2+?
      • 1...Be4
        • 2.Bxe4#
        • 2.Rc5#
      • 1...f3
        • 2.Se3#
      • 1...e4
        • 2.Rc5#
      • 1...hxg2!
    • 1.Rb4+?
      • 1...Kc6
        • 2.Qc4#
      • 1...Rc4
        • 2.Qxc4#
      • 1...Sb3!
    • 1.Qd2+?
      • 1...Bd3
        • 2.Qxd3#
      • 1...cxd2!
    • 1.Qa5+?
      • 1...Rc5
        • 2.Qxc5#
      • 1...Sb5!
    • 1.Qa6?
      • threat
        • 2.Sf6#
      • 1...Rd6
        • 2.Qxd6#
      • 1...Rf8
        • 2.Qd6#
      • 1...Sc6
        • 2.Qb5#
      • 1...e4
        • 2.Rd4#
      • 1...Rc6!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qxe5#
      • 1...Rxc4
        • 2.Qxc4#
      • 1...Rc5
        • 2.Rxc5#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Be4
        • 2.Qxe4#
      • 1...Sc6
        • 2.Rc5#
      • 1...e4
        • 2.Qd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(i);OGATE,P_SPINR(i),XR(E)::QAB1(C),XR(i)
    • R(i);SBLOCK::QAB(C)+R(E),DCHECK
    • B(h);SBLOCK::QAB(C)+R(E),DCHECK
    • S(g);SBLOCK::QAB(C)+R(E),DCHECK
    • P(d);N_GUARD::S(F)
    • P(f);SBLOCK::QAB(C)+R(E),DCHECK
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • P(d);P_SPINP(d)::S(F)
        • P(f);P_SPINP(f)::QAB(C)+R(E),DCHECK
      • Refutation
        • P(c);XB(A)
    • Try
      • R(E);CHECK
      • Vars
        • K(e);S_FLIGHT::QAR2(C)
        • R(i);N_GUARD,P_SPINR(i)::QAB1(C),XR(i)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(C);CHECK
      • Vars
        • B(h);N_GUARD,P_SPINB(h)::QAR2(C),XB(h)
      • Refutation
        • P(b);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • R(i);N_GUARD,P_SPINR(i)::QAR1(C),XR(i)
      • Refutation
        • S(g);P_SPINS(g)
    • Try
      • Q(C);
      • Threat
        • S(F)
      • Vars
        • R(j);N_GUARD::QAR1(C),XR(j)
        • R(j);N_GUARD::QAR1(C)
        • S(g);N_GUARD,S_CUTR(i)::QAR2(C)
        • P(f);N_GUARD::R1(E)
      • Refutation
        • R(i);
  • Actual
    • Q(C);
    • Threat
      • QAR1(C),XP(f)
    • Vars
      • R(i);OGATE,XR(E)::QAB1(C),XR(i)
      • R(i);N_GUARD::R1(E),XR(i)
      • B(h);N_GUARD::QAR2(C),XB(h)
      • B(h);N_GUARD::QAB1(C),XB(h)
      • S(g);S_CUTR(i)::R1(E)
      • P(f);S_CUTB(h)::QAR(C)
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