MESON Chess Problem Database

Problem Display
PID: 252806 (3R4/r2r3B/q1p3R1/p1P1bN2/N1P5/3k1P1K/P2p2p1/3Q2B1 w - - 0 1)

Simadhinata, Januarta (Siem Giok Liam)

Schakend Nederland, 1966

3R4/r2r3B/q1p3R1/p1P1bN2/N1P5/3k1P1K/P2p2p1/3Q2B1

#2

12 + 9

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc4
      • 2.Qb3#
  • Tries
    • 1.Sb2+?
      • 1...Kc3
        • 2.Qb3#
      • 1...Bxb2!
    • 1.Se3?
      • threat
        • 2.Rg4#
        • 2.Rd6#
      • 1...Kd4
        • 2.Qxd2#
      • 1...Qxc4
        • 2.Rd6#
      • 1...Rxd8
        • 2.Rd6#
      • 1...Rd4
        • 2.Rg7#
      • 1...Rd6
        • 2.Rgxd6#
      • 1...Bd4
        • 2.Rg7#
      • 1...Bf4
        • 2.Rd6#
      • 1...Bd6
        • 2.Rxd6#
      • 1...Bf6
        • 2.Rg4#
      • 1...Rd5!
    • 1.Qb1+?
      • 1...Kxc4
        • 2.Qb3#
      • 1...Ke2!
  • Keys
    • 1.Rg7!
      • threat
        • 2.Sd6#
      • 1...Kxc4
        • 2.Qb3#
      • 1...Qxc4
        • 2.Sd4#
      • 1...Rd4
        • 2.Se3#
      • 1...Rd6
        • 2.Sxd6#
      • 1...Bd6
        • 2.Sxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(c);N_GUARD,N_SPINP(a),N_SPINR(i),S_CUTB(e),S_FLIGHT,XP(G)::QAB1(A)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(c);N_GUARD,N_SPINP(a),N_SPINR(i),P-FLIGHT::QAR1(A)
      • Refutation
        • B(e);XS(F)
    • Try
      • S(I);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);N_GUARD,P-FLIGHT::QAR2(A),XP(a)
        • Q(f);XP(G)::B(K)+R(J),DCHECK
        • R(i);N_SPINR(i),XR(L)::B(K)+R(J),DCHECK
        • R(i);::B(K)+R(J)
        • R(i);::B(K)+R(J),DCHECK,XR(i)
        • B(e);N_SPINR(i),SBLOCK::B(K)+R(J)
        • B(e);::B(K)+R(J),DCHECK
        • B(e);N_SPINR(i)::B(K)+R(J),DCHECK,XB(e)
        • B(e);::B(K)+R(J)
      • Refutation
        • R(i);
    • Try
      • Q(A);CHECK,N_PINP(a)
      • Vars
        • K(c);N_GUARD,N_SPINR(i),S_CUTB(e),S_FLIGHT,XP(G)::QAB1(A)
      • Refutation
        • K(c);N_SPINR(i),S_FLIGHT
  • Actual
    • R(J);
    • Threat
      • B(K)+S(I)
    • Vars
      • K(c);N_GUARD,N_SPINP(a),N_SPINR(i),S_CUTB(e),S_FLIGHT,XP(G)::QAB1(A)
      • Q(f);SBLOCK,XP(G)::B(K)+S(I)
      • R(i);::B(K)+S(I)
      • R(i);::B(K)+S(I),XR(i)
      • B(e);N_SPINR(i)::B(K)+S(I),XB(e)
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