MESON Chess Problem Database

Problem Display
PID: 242243 (4n2K/3p4/3b4/2pRrP2/1N2kpP1/5b2/1pN1Bn2/Q7 w - - 0 1)

Kisis, Imants J

Szachy, 1976

4n2K/3p4/3b4/2pRrP2/1N2kpP1/5b2/1pN1Bn2/Q7

#2

8 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Bd3#
    • 1...Sh1
      • 2.Bd3#
    • 1...Sd3
      • 2.Bxd3#
    • 1...Sh3
      • 2.Bd3#
    • 1...Sxg4
      • 2.Bd3#
    • 1...cxb4
      • 2.Rd4#
    • 1...c4
      • 2.Rd4#
  • Tries
    • 1.Qa8?
      • threat
        • 2.Rd4#
      • 1...Rxd5
        • 2.Qxd5#
      • 1...Rxf5
        • 2.Rxf5#
      • 1...Sxg4
        • 2.Bd3#
      • 1...Re6
        • 2.Rxc5#
      • 1...Re7
        • 2.Rxc5#
      • 1...Bxg4!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Bd3#
      • 1...Bxe2
        • 2.Qxe2#
      • 1...Bxg4
        • 2.Bxg4#
      • 1...cxb4
        • 2.Rd4#
      • 1...Bh1
        • 2.Bd1#
      • 1...Bg2
        • 2.Bd1#
      • 1...Sd3
        • 2.Bxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • S(b);N_GUARD::B(C)
    • S(b);N_GUARD::B(C),XS(b)
    • S(b);N_GUARD,XP(E)::B(C)
    • P(f);N_GUARD,XS(D)::R1(F)
    • P(f);N_GUARD::R1(F)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB(A)+R(F),DCHECK
      • Vars
        • R(g);OGATE,P_SPINR(g),XR(F)::QAB1(A),XR(g)
        • R(g);OGATE,XP(G)::QAB(A)+R(F),XR(g)
        • S(b);N_GUARD,XP(E)::B(C)
        • R(g);N_GUARD::QAB(A)+R(F),XP(f)
      • Refutation
        • B(c);XP(E)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)+B(C),DCHECK
    • Vars
      • B(c);OGATE,P_SPINB(c),XB(C)::QAR2(A),XB(c)
      • B(c);OGATE,XP(E)::QAR(A)+B(C),XB(c)
      • P(f);N_GUARD,XS(D)::R1(F)
      • B(c);N_GUARD::QAR(A)+B(C)
      • S(b);::QAR(A)+B(C),DCHECK,XS(b)
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